diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..1d75129
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,122 @@
+---
+minimum_pre_commit_version: 1.21.0
+repos:
+  # meta
+
+  - repo: meta
+    hooks:
+      - id: check-hooks-apply
+      - id: check-useless-excludes
+
+  - repo: https://codeberg.org/hjacobs/kube-manifest-lint
+    rev: 0.2.0
+    hooks:
+      - id: kube-manifest-lint
+        exclude: kustomization.yaml
+
+  # formatters
+
+  - repo: https://github.com/asottile/reorder_python_imports
+    rev: v2.2.0
+    hooks:
+      - id: reorder-python-imports
+
+  - repo: https://github.com/ambv/black
+    rev: 19.10b0
+    hooks:
+      - id: black
+
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v2.3.0
+    hooks:
+      - id: pyupgrade
+        stages: [push]
+
+  # linters
+
+  - repo: https://github.com/PyCQA/bandit
+    rev: 1.6.2
+    hooks:
+      - id: bandit
+        args: ["-x", "tests"]
+        stages: [push]
+
+  - repo: https://github.com/PyCQA/pydocstyle
+    rev: 5.0.2
+    hooks:
+      - id: pydocstyle
+        args: ["--ignore=D10,D21,D202"]
+
+  - repo: local
+    hooks:
+
+      - id: safety
+        name: safety
+        entry: safety
+        language: system
+        pass_filenames: false
+        args: ["check", "--bare"]
+        stages: [push]
+
+      - id: poetry
+        name: poetry
+        description: Validates the structure of the pyproject.toml file
+        entry: poetry check
+        language: system
+        pass_filenames: false
+        files: ^pyproject.toml$
+        stages: [push]
+
+  - repo: https://github.com/adrienverge/yamllint
+    rev: v1.23.0
+    hooks:
+      - id: yamllint
+        args: ["--strict", "-d", "{rules: {line-length: {max: 180}}}"]
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v0.770
+    hooks:
+      - id: mypy
+
+  - repo: https://github.com/pryorda/dockerfilelint-precommit-hooks
+    rev: v0.1.0
+    hooks:
+      - id: dockerfilelint
+        stages: [commit]  # required
+
+  # miscellaneous
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.5.0
+    hooks:
+      - id: check-added-large-files
+      - id: check-docstring-first
+      - id: debug-statements
+      - id: end-of-file-fixer
+      - id: flake8
+        additional_dependencies: ["flake8-bugbear"]
+      - id: trailing-whitespace
+      - id: check-ast
+      - id: check-builtin-literals
+      - id: detect-private-key
+      - id: mixed-line-ending
+      - id: name-tests-test
+        args: ["--django"]
+
+  - repo: https://github.com/pre-commit/pygrep-hooks
+    rev: v1.5.1
+    hooks:
+      #      - id: rst-backticks
+      - id: python-use-type-annotations
+      - id: python-no-log-warn
+      - id: python-no-eval
+      - id: python-check-mock-methods
+      - id: python-check-blanket-noqa
+
+  # commit-msg
+  # http://jorisroovers.com/gitlint/#using-gitlint-through-pre-commit
+
+  - repo: https://github.com/jorisroovers/gitlint
+    rev:  v0.13.1
+    hooks:
+      - id: gitlint
diff --git a/Dockerfile b/Dockerfile
index 1bd918a..ebc4eb3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.8-slim
 
 WORKDIR /
 
-RUN apt-get update && apt-get install --yes gcc
+RUN apt-get update && apt-get install --yes --no-install-recommends gcc && rm -rf /var/lib/apt/lists/*
 
 RUN pip3 install poetry
 
@@ -12,7 +12,6 @@ COPY pyproject.toml /
 RUN poetry config virtualenvs.create false && \
     poetry install --no-interaction --no-dev --no-ansi
 
-
 FROM python:3.8-slim
 
 WORKDIR /
diff --git a/Makefile b/Makefile
index fc6378d..bedccbc 100644
--- a/Makefile
+++ b/Makefile
@@ -14,10 +14,11 @@ install:
 clean:
 	rm -fr kube_ops_view/static/build
 
-test: install
-	poetry run flake8
-	poetry run black --check kube_ops_view
-	# poetry run mypy --ignore-missing-imports kube_ops_view
+.PHONY: lint
+lint: install
+	poetry run pre-commit run --all-files
+
+test: lint install
 	poetry run coverage run --source=kube_ops_view -m py.test -v
 	poetry run coverage report
 
diff --git a/app/src/bars.js b/app/src/bars.js
index 5f89850..d1e920b 100644
--- a/app/src/bars.js
+++ b/app/src/bars.js
@@ -83,4 +83,3 @@ export default class Bars extends PIXI.Graphics {
     }
 
 }
-
diff --git a/app/src/cluster.js b/app/src/cluster.js
index a36f08b..6803baf 100644
--- a/app/src/cluster.js
+++ b/app/src/cluster.js
@@ -39,7 +39,7 @@ export default class Cluster extends PIXI.Graphics {
         let workerWidth = 0
         let workerHeight = 0
         const workerNodes = []
-        
+
         let maxPodsInWorkers = 0
         let maxPodsInMasters = 0
         // get the largest number of pods (workers and masters)
@@ -56,7 +56,7 @@ export default class Cluster extends PIXI.Graphics {
                 }
             }
         }
-        
+
         // with maxPodsInWorkers we can calculate the size of all nodes in the cluster
         this.podsPerRowWorker = Math.max(
             App.current.defaultPodsPerRow,
@@ -90,7 +90,7 @@ export default class Cluster extends PIXI.Graphics {
         for (const nodeName of Object.keys(this.cluster.nodes).sort()) {
             const node = this.cluster.nodes[nodeName]
             let nodeBox = null
-         
+
             if (isMaster(node.labels)) {
                 nodeBox = new Node(node, this, this.tooltip, this.podsPerRowMaster, this.widthOfMasterNodePx, this.heightOfMasterNodePx)
                 nodeBox.draw()
diff --git a/app/src/selectbox.js b/app/src/selectbox.js
index 42cf101..37a4bbe 100644
--- a/app/src/selectbox.js
+++ b/app/src/selectbox.js
@@ -120,4 +120,3 @@ export default class SelectBox extends PIXI.Graphics {
     }
 
 }
-
diff --git a/deploy/kustomization.yaml b/deploy/kustomization.yaml
new file mode 100644
index 0000000..73741ad
--- /dev/null
+++ b/deploy/kustomization.yaml
@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - deployment.yaml
+  - rbac.yaml
+  - service.yaml
+  - ingress.yaml
+  - redis-deployment.yaml
+  - redis-service.yaml
diff --git a/deploy/auth.yaml b/deploy/rbac.yaml
similarity index 100%
rename from deploy/auth.yaml
rename to deploy/rbac.yaml
diff --git a/docs/Makefile b/docs/Makefile
index 746a3ff..028bd56 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -17,4 +17,4 @@ help:
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
\ No newline at end of file
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/conf.py b/docs/conf.py
index 652fb2d..1300504 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -12,7 +12,6 @@
 #
 # All configuration values have a default; values that are commented out
 # serve to show the default.
-
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -20,44 +19,42 @@
 # import os
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
-
-
 # -- General configuration ------------------------------------------------
-
 # If your documentation needs a minimal Sphinx version, state it here.
 #
 # needs_sphinx = '1.0'
-
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = []
+from typing import List
+
+extensions: List[str] = []
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 #
 # source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = 'Kubernetes Operational View'
-copyright = '2017, Henning Jacobs'
-author = 'Henning Jacobs'
+project = "Kubernetes Operational View"
+copyright = "2017, Henning Jacobs"
+author = "Henning Jacobs"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '0.1'
+version = "0.1"
 # The full version, including alpha/beta/rc tags.
-release = '0.1'
+release = "0.1"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -69,10 +66,10 @@ language = None
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False
@@ -89,7 +86,8 @@ try:
     html_theme = "sphinx_rtd_theme"
 
     html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
-except:
+except Exception:
+    # Sphinx Theme not found, ignore!
     pass
 
 # Theme options are theme-specific and customize the look and feel of a theme
@@ -101,61 +99,4 @@ except:
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
-
-
-# -- Options for HTMLHelp output ------------------------------------------
-
-# Output file base name for HTML help builder.
-htmlhelp_basename = 'KubernetesOperationalViewdoc'
-
-
-# -- Options for LaTeX output ---------------------------------------------
-
-latex_elements = {
-    # The paper size ('letterpaper' or 'a4paper').
-    #
-    # 'papersize': 'letterpaper',
-
-    # The font size ('10pt', '11pt' or '12pt').
-    #
-    # 'pointsize': '10pt',
-
-    # Additional stuff for the LaTeX preamble.
-    #
-    # 'preamble': '',
-
-    # Latex figure (float) alignment
-    #
-    # 'figure_align': 'htbp',
-}
-
-# Grouping the document tree into LaTeX files. List of tuples
-# (source start file, target name, title,
-#  author, documentclass [howto, manual, or own class]).
-latex_documents = [
-    (master_doc, 'KubernetesOperationalView.tex', 'Kubernetes Operational View Documentation',
-     'Henning Jacobs', 'manual'),
-]
-
-
-# -- Options for manual page output ---------------------------------------
-
-# One entry per manual page. List of tuples
-# (source start file, name, description, authors, manual section).
-man_pages = [
-    (master_doc, 'kubernetesoperationalview', 'Kubernetes Operational View Documentation',
-     [author], 1)
-]
-
-
-# -- Options for Texinfo output -------------------------------------------
-
-# Grouping the document tree into Texinfo files. List of tuples
-# (source start file, target name, title, author,
-#  dir menu entry, description, category)
-texinfo_documents = [
-    (master_doc, 'KubernetesOperationalView', 'Kubernetes Operational View Documentation',
-     author, 'KubernetesOperationalView', 'One line description of project.',
-     'Miscellaneous'),
-]
+html_static_path = ["_static"]
diff --git a/docs/getting-started.rst b/docs/getting-started.rst
index 98d0c29..e1ca73f 100644
--- a/docs/getting-started.rst
+++ b/docs/getting-started.rst
@@ -16,5 +16,3 @@ Afterwards you can open "kube-ops-view" via the kubectl proxy:
     $ kubectl proxy
 
 Now direct your browser to http://localhost:8001/api/v1/proxy/namespaces/default/services/kube-ops-view/
-
-
diff --git a/kube_ops_view/backoff.py b/kube_ops_view/backoff.py
index ad36b27..8142b51 100644
--- a/kube_ops_view/backoff.py
+++ b/kube_ops_view/backoff.py
@@ -7,11 +7,14 @@ def expo(n: int, base=2, factor=1, max_value=None):
     Adapted from https://github.com/litl/backoff/blob/master/backoff.py (MIT License)
 
     Args:
+    ----
+        n: The exponent.
         base: The mathematical base of the exponentiation operation
         factor: Factor to multiply the exponentation by.
         max_value: The maximum value to yield. Once the value in the
              true exponential sequence exceeds this, the value
              of max_value will forever after be yielded.
+
     """
     a = factor * base ** n
     if max_value is None or a < max_value:
@@ -27,8 +30,12 @@ def random_jitter(value, jitter=1):
 
     This adds up to 1 second of additional time to the original value.
     Prior to backoff version 1.2 this was the default jitter behavior.
+
     Args:
+    ----
         value: The unadulterated backoff value.
+        jitter: Jitter amount.
+
     """
     return value + random.uniform(0, jitter)
 
@@ -43,6 +50,8 @@ def full_jitter(value):
     (http://www.awsarchitectureblog.com/2015/03/backoff.html)
 
     Args:
+    ----
         value: The unadulterated backoff value.
+
     """
     return random.uniform(0, value)
diff --git a/kube_ops_view/cluster_discovery.py b/kube_ops_view/cluster_discovery.py
index cf6d423..eceef1d 100644
--- a/kube_ops_view/cluster_discovery.py
+++ b/kube_ops_view/cluster_discovery.py
@@ -2,14 +2,15 @@ import logging
 import re
 import time
 from pathlib import Path
+from typing import List
 from urllib.parse import urljoin
 
 import requests
 import tokens
+from pykube import HTTPClient
+from pykube import KubeConfig
 from requests.auth import AuthBase
 
-from pykube import HTTPClient, KubeConfig
-
 # default URL points to kubectl proxy
 DEFAULT_CLUSTERS = "http://localhost:8001/"
 CLUSTER_ID_INVALID_CHARS = re.compile("[^a-z0-9:-]")
@@ -20,7 +21,7 @@ tokens.configure(from_file_only=True)
 
 
 def generate_cluster_id(url: str):
-    """Generate some "cluster ID" from given API server URL"""
+    """Generate some "cluster ID" from given API server URL."""
     for prefix in ("https://", "http://"):
         if url.startswith(prefix):
             url = url[len(prefix) :]
@@ -28,7 +29,8 @@ def generate_cluster_id(url: str):
 
 
 class StaticAuthorizationHeaderAuth(AuthBase):
-    """Static authentication with given "Authorization" header"""
+
+    """Static authentication with given "Authorization" header."""
 
     def __init__(self, authorization):
         self.authorization = authorization
@@ -39,8 +41,8 @@ class StaticAuthorizationHeaderAuth(AuthBase):
 
 
 class OAuthTokenAuth(AuthBase):
-    """Dynamic authentication using the "tokens" library to load OAuth tokens from file
-    (potentially mounted from a Kubernetes secret)"""
+
+    """Dynamic authentication using the "tokens" library to load OAuth tokens from file (potentially mounted from a Kubernetes secret)."""
 
     def __init__(self, token_name):
         self.token_name = token_name
@@ -105,7 +107,7 @@ class ClusterRegistryDiscoverer:
         self._url = cluster_registry_url
         self._cache_lifetime = cache_lifetime
         self._last_cache_refresh = 0
-        self._clusters = []
+        self._clusters: List[Cluster] = []
         self._session = requests.Session()
         self._session.auth = OAuthTokenAuth("read-only")
 
@@ -127,8 +129,10 @@ class ClusterRegistryDiscoverer:
                     )
             self._clusters = clusters
             self._last_cache_refresh = time.time()
-        except:
-            logger.exception(f"Failed to refresh from cluster registry {self._url}")
+        except Exception as e:
+            logger.exception(
+                f"Failed to refresh from cluster registry {self._url}: {e}"
+            )
 
     def get_clusters(self):
         now = time.time()
diff --git a/kube_ops_view/kubernetes.py b/kube_ops_view/kubernetes.py
index d85a8f0..31607da 100644
--- a/kube_ops_view/kubernetes.py
+++ b/kube_ops_view/kubernetes.py
@@ -2,12 +2,12 @@ import datetime
 import logging
 import time
 
-import requests
-
 import pykube
-
-from pykube import Pod, Node
-from pykube.objects import APIObject, NamespacedAPIObject
+import requests
+from pykube import Node
+from pykube import Pod
+from pykube.objects import APIObject
+from pykube.objects import NamespacedAPIObject
 
 from .utils import get_short_error_message
 
diff --git a/kube_ops_view/main.py b/kube_ops_view/main.py
index e9cd2ff..7bc9408 100644
--- a/kube_ops_view/main.py
+++ b/kube_ops_view/main.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-
 import gevent.monkey
 
 gevent.monkey.patch_all()
@@ -15,6 +14,7 @@ import os
 import signal
 import time
 import kube_ops_view
+from typing import Union
 from pathlib import Path
 
 from flask import Flask, redirect, url_for
@@ -39,7 +39,7 @@ logger = logging.getLogger(__name__)
 SERVER_STATUS = {"shutdown": False}
 AUTHORIZE_URL = os.getenv("AUTHORIZE_URL")
 ACCESS_TOKEN_URL = os.getenv("ACCESS_TOKEN_URL")
-APP_URL = os.getenv("APP_URL")
+APP_URL = os.getenv("APP_URL") or ""
 SCOPE = os.getenv("SCOPE")
 
 app = Flask(__name__)
@@ -134,7 +134,7 @@ def event(cluster_ids: set):
 @app.route("/events")
 @authorize
 def get_events():
-    """SSE (Server Side Events), for an EventSource"""
+    """SSE (Server Side Events), for an EventSource."""
     cluster_ids = set()
     for _id in flask.request.args.get("cluster_ids", "").split():
         if _id:
@@ -165,7 +165,7 @@ def redeem_screen_token(token: str):
     )
     try:
         app.store.redeem_screen_token(token, remote_addr)
-    except:
+    except Exception:
         flask.abort(401)
     flask.session["auth_token"] = (token, "")
     return redirect(urljoin(APP_URL, "/"))
@@ -313,6 +313,13 @@ def main(
         "pod_link_url_template": pod_link_url_template,
     }
 
+    discoverer: Union[
+        MockDiscoverer,
+        ClusterRegistryDiscoverer,
+        KubeconfigDiscoverer,
+        StaticClusterDiscoverer,
+    ]
+
     if mock:
         cluster_query = query_mock_cluster
         discoverer = MockDiscoverer()
diff --git a/kube_ops_view/mock.py b/kube_ops_view/mock.py
index e749d38..a2e99ab 100644
--- a/kube_ops_view/mock.py
+++ b/kube_ops_view/mock.py
@@ -1,6 +1,6 @@
-import time
 import random
 import string
+import time
 
 
 def hash_int(x: int):
@@ -35,7 +35,7 @@ def generate_mock_pod(index: int, i: int, j: int):
 
     phase = pod_phases[hash_int((index + 1) * (i + 1) * (j + 1)) % len(pod_phases)]
     containers = []
-    for k in range(1 + j % 2):
+    for _ in range(1 + j % 2):
         # generate "more real data"
         requests_cpu = random.randint(10, 50)
         requests_memory = random.randint(64, 256)
@@ -88,7 +88,7 @@ def generate_mock_pod(index: int, i: int, j: int):
 
 
 def query_mock_cluster(cluster):
-    """Generate deterministic (no randomness!) mock data"""
+    """Generate deterministic (no randomness!) mock data."""
     index = int(cluster.id.split("-")[-1])
     nodes = {}
     for i in range(10):
diff --git a/kube_ops_view/oauth.py b/kube_ops_view/oauth.py
index 5fb2579..1d6253c 100644
--- a/kube_ops_view/oauth.py
+++ b/kube_ops_view/oauth.py
@@ -7,7 +7,8 @@ CREDENTIALS_DIR = os.getenv("CREDENTIALS_DIR", "")
 
 
 class OAuth2ConsumerBlueprintWithClientRefresh(OAuth2ConsumerBlueprint):
-    """Same as flask_dance.consumer.OAuth2ConsumerBlueprint, but loads client credentials from file"""
+
+    """Same as flask_dance.consumer.OAuth2ConsumerBlueprint, but loads client credentials from file."""
 
     def refresh_credentials(self):
         with open(os.path.join(CREDENTIALS_DIR, "authcode-client-id")) as fd:
diff --git a/kube_ops_view/stores.py b/kube_ops_view/stores.py
index e5028dc..73eb38c 100644
--- a/kube_ops_view/stores.py
+++ b/kube_ops_view/stores.py
@@ -2,11 +2,14 @@ import json
 import logging
 import random
 import string
-import redis
 import time
-
-from redlock import Redlock
+from abc import ABC
+from abc import abstractmethod
 from queue import Queue
+from typing import Set
+
+import redis
+from redlock import Redlock
 
 logger = logging.getLogger(__name__)
 
@@ -14,21 +17,21 @@ ONE_YEAR = 3600 * 24 * 365
 
 
 def generate_token(n: int):
-    """Generate a random ASCII token of length n"""
+    """Generate a random ASCII token of length n."""
     # uses os.urandom()
     rng = random.SystemRandom()
     return "".join([rng.choice(string.ascii_letters + string.digits) for i in range(n)])
 
 
 def generate_token_data():
-    """Generate screen token data for storing"""
+    """Generate screen token data for storing."""
     token = generate_token(10)
     now = time.time()
     return {"token": token, "created": now, "expires": now + ONE_YEAR}
 
 
 def check_token(token: str, remote_addr: str, data: dict):
-    """Check whether the given screen token is valid, raises exception if not"""
+    """Check whether the given screen token is valid, raises exception if not."""
     now = time.time()
     if (
         data
@@ -41,11 +44,19 @@ def check_token(token: str, remote_addr: str, data: dict):
         raise ValueError("Invalid token")
 
 
-class AbstractStore:
+class AbstractStore(ABC):
+    @abstractmethod
+    def set(self, key, val):
+        pass
+
+    @abstractmethod
+    def get(self, key):
+        return None
+
     def get_cluster_ids(self):
         return self.get("cluster-ids") or []
 
-    def set_cluster_ids(self, cluster_ids: set):
+    def set_cluster_ids(self, cluster_ids: Set[str]):
         self.set("cluster-ids", list(sorted(cluster_ids)))
 
     def get_cluster_status(self, cluster_id: str) -> dict:
@@ -62,7 +73,8 @@ class AbstractStore:
 
 
 class MemoryStore(AbstractStore):
-    """Memory-only backend, mostly useful for local debugging"""
+
+    """Memory-only backend, mostly useful for local debugging."""
 
     def __init__(self):
         self._data = {}
@@ -110,7 +122,8 @@ class MemoryStore(AbstractStore):
 
 
 class RedisStore(AbstractStore):
-    """Redis-based backend for deployments with replicas > 1"""
+
+    """Redis-based backend for deployments with replicas > 1."""
 
     def __init__(self, url: str):
         logger.info("Connecting to Redis on {}..".format(url))
@@ -146,14 +159,14 @@ class RedisStore(AbstractStore):
                 yield (event_type, json.loads(data))
 
     def create_screen_token(self):
-        """Generate a new screen token and store it in Redis"""
+        """Generate a new screen token and store it in Redis."""
         data = generate_token_data()
         token = data["token"]
         self._redis.set("screen-tokens:{}".format(token), json.dumps(data))
         return token
 
     def redeem_screen_token(self, token: str, remote_addr: str):
-        """Validate the given token and bind it to the IP"""
+        """Validate the given token and bind it to the IP."""
         redis_key = "screen-tokens:{}".format(token)
         data = self._redis.get(redis_key)
         if not data:
diff --git a/kube_ops_view/update.py b/kube_ops_view/update.py
index eee01a5..d8da71a 100644
--- a/kube_ops_view/update.py
+++ b/kube_ops_view/update.py
@@ -1,11 +1,14 @@
 import logging
 import time
+from typing import Callable
 
 import gevent
 import json_delta
 import requests.exceptions
 
-from .backoff import expo, random_jitter
+from .backoff import expo
+from .backoff import random_jitter
+from .cluster_discovery import Cluster
 from .utils import get_short_error_message
 
 logger = logging.getLogger(__name__)
@@ -15,7 +18,7 @@ def calculate_backoff(tries: int):
     return random_jitter(expo(tries, factor=2, max_value=60), jitter=4)
 
 
-def handle_query_failure(e: Exception, cluster, backoff: dict):
+def handle_query_failure(e: Exception, cluster: Cluster, backoff: dict):
     if not backoff:
         backoff = {}
     tries = backoff.get("tries", 0) + 1
@@ -37,7 +40,7 @@ def handle_query_failure(e: Exception, cluster, backoff: dict):
 
 def update_clusters(
     cluster_discoverer,
-    query_cluster: callable,
+    query_cluster: Callable[[Cluster], dict],
     store,
     query_interval: float = 5,
     debug: bool = False,
@@ -109,8 +112,8 @@ def update_clusters(
                             store.set_cluster_data(cluster.id, data)
                     store.set_cluster_status(cluster.id, status)
                 store.set_cluster_ids(cluster_ids)
-            except:
-                logger.exception("Failed to update")
+            except Exception as e:
+                logger.exception(f"Failed to update: {e}")
             finally:
                 store.release_lock(lock)
         # sleep 1-2 seconds
diff --git a/kube_ops_view/utils.py b/kube_ops_view/utils.py
index 3d3cc13..b31b2c1 100644
--- a/kube_ops_view/utils.py
+++ b/kube_ops_view/utils.py
@@ -2,7 +2,7 @@ import requests.exceptions
 
 
 def get_short_error_message(e: Exception):
-    """Generate a reasonable short message why the HTTP request failed"""
+    """Generate a reasonable short message why the HTTP request failed."""
 
     if isinstance(e, requests.exceptions.RequestException) and e.response is not None:
         # e.g. "401 Unauthorized"
diff --git a/poetry.lock b/poetry.lock
index 4feb3cf..9d3eeb1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -6,6 +6,17 @@ optional = false
 python-versions = "*"
 version = "1.4.3"
 
+[[package]]
+category = "dev"
+description = "A few extensions to pyyaml."
+name = "aspy.yaml"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.3.0"
+
+[package.dependencies]
+pyyaml = "*"
+
 [[package]]
 category = "dev"
 description = "Atomic file writes."
@@ -55,20 +66,28 @@ description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
 optional = false
 python-versions = "*"
-version = "2019.11.28"
+version = "2020.4.5.1"
 
 [[package]]
 category = "main"
 description = "Foreign Function Interface for Python calling C code."
-marker = "sys_platform == \"win32\" and platform_python_implementation == \"CPython\""
+marker = "platform_python_implementation == \"CPython\" and sys_platform == \"win32\""
 name = "cffi"
 optional = false
 python-versions = "*"
-version = "1.13.2"
+version = "1.14.0"
 
 [package.dependencies]
 pycparser = "*"
 
+[[package]]
+category = "dev"
+description = "Validate configuration and produce human readable error messages."
+name = "cfgv"
+optional = false
+python-versions = ">=3.6.1"
+version = "3.1.0"
+
 [[package]]
 category = "main"
 description = "Universal encoding detector for Python 2 and 3"
@@ -82,8 +101,8 @@ category = "main"
 description = "Composable command line interface toolkit"
 name = "click"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "7.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "7.1.1"
 
 [[package]]
 category = "dev"
@@ -107,17 +126,25 @@ category = "dev"
 description = "Show coverage stats online via coveralls.io"
 name = "coveralls"
 optional = false
-python-versions = "*"
-version = "1.9.2"
+python-versions = ">= 3.5"
+version = "2.0.0"
 
 [package.dependencies]
-coverage = ">=3.6,<5.0"
+coverage = ">=4.1,<6.0"
 docopt = ">=0.6.1"
 requests = ">=1.0.0"
 
 [package.extras]
 yaml = ["PyYAML (>=3.10)"]
 
+[[package]]
+category = "dev"
+description = "Distribution utilities"
+name = "distlib"
+optional = false
+python-versions = "*"
+version = "0.3.0"
+
 [[package]]
 category = "dev"
 description = "Pythonic argument parser, that will make you smile"
@@ -134,6 +161,14 @@ optional = false
 python-versions = ">=2.7"
 version = "0.3"
 
+[[package]]
+category = "dev"
+description = "A platform independent file lock."
+name = "filelock"
+optional = false
+python-versions = "*"
+version = "3.0.12"
+
 [[package]]
 category = "dev"
 description = "the modular source code checker: pep8, pyflakes and co"
@@ -154,7 +189,7 @@ description = "A simple framework for building complex web applications."
 name = "flask"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "1.1.1"
+version = "1.1.2"
 
 [package.dependencies]
 Jinja2 = ">=2.10.1"
@@ -192,18 +227,20 @@ category = "main"
 description = "Coroutine-based network library"
 name = "gevent"
 optional = false
-python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
-version = "1.4.0"
+python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
+version = "20.4.0"
 
 [package.dependencies]
-cffi = ">=1.11.5"
+cffi = ">=1.12.2"
 greenlet = ">=0.4.14"
 
 [package.extras]
-dnspython = ["dnspython", "idna"]
-doc = ["repoze.sphinx.autointerface"]
+dnspython = ["dnspython (>=1.16.0)", "idna"]
+docs = ["repoze.sphinx.autointerface", "sphinxcontrib-programoutput"]
 events = ["zope.event", "zope.interface"]
-test = ["zope.interface", "zope.event", "requests", "objgraph", "psutil", "futures", "mock", "coverage (>=5.0a3)", "coveralls (>=1.0)"]
+monitor = ["psutil (>=5.6.1)", "psutil (5.6.3)"]
+recommended = ["dnspython (>=1.16.0)", "idna", "zope.event", "zope.interface", "cffi (>=1.12.2)", "psutil (>=5.6.1)", "psutil (5.6.3)"]
+test = ["dnspython (>=1.16.0)", "idna", "zope.event", "zope.interface", "requests", "objgraph", "cffi (>=1.12.2)", "psutil (>=5.6.1)", "psutil (5.6.3)", "futures", "mock", "contextvars (2.4)", "coverage (<5.0)", "coveralls (>=1.7.0)"]
 
 [[package]]
 category = "main"
@@ -214,13 +251,24 @@ optional = false
 python-versions = "*"
 version = "0.4.15"
 
+[[package]]
+category = "dev"
+description = "File identification library for Python"
+name = "identify"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+version = "1.4.15"
+
+[package.extras]
+license = ["editdistance"]
+
 [[package]]
 category = "main"
 description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8"
+version = "2.9"
 
 [[package]]
 category = "dev"
@@ -229,7 +277,7 @@ marker = "python_version < \"3.8\""
 name = "importlib-metadata"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.3.0"
+version = "1.6.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -251,8 +299,8 @@ category = "main"
 description = "A very fast and expressive template engine."
 name = "jinja2"
 optional = false
-python-versions = "*"
-version = "2.10.3"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "2.11.2"
 
 [package.dependencies]
 MarkupSafe = ">=0.23"
@@ -290,7 +338,7 @@ description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
 optional = false
 python-versions = ">=3.5"
-version = "8.0.2"
+version = "8.2.0"
 
 [[package]]
 category = "dev"
@@ -316,6 +364,14 @@ optional = false
 python-versions = "*"
 version = "0.4.3"
 
+[[package]]
+category = "dev"
+description = "Node.js virtual environment builder"
+name = "nodeenv"
+optional = false
+python-versions = "*"
+version = "1.3.5"
+
 [[package]]
 category = "main"
 description = "A generic, spec-compliant, thorough implementation of the OAuth request-signing logic"
@@ -335,7 +391,7 @@ description = "Core utilities for Python packages"
 name = "packaging"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.2"
+version = "20.3"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
@@ -346,8 +402,8 @@ category = "dev"
 description = "Utility library for gitignore style pattern matching of file paths."
 name = "pathspec"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.6.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.8.0"
 
 [[package]]
 category = "dev"
@@ -365,13 +421,35 @@ version = ">=0.12"
 [package.extras]
 dev = ["pre-commit", "tox"]
 
+[[package]]
+category = "dev"
+description = "A framework for managing and maintaining multi-language pre-commit hooks."
+name = "pre-commit"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+version = "1.21.0"
+
+[package.dependencies]
+"aspy.yaml" = "*"
+cfgv = ">=2.0.0"
+identify = ">=1.0.0"
+nodeenv = ">=0.11.1"
+pyyaml = "*"
+six = "*"
+toml = "*"
+virtualenv = ">=15.2"
+
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = "*"
+
 [[package]]
 category = "dev"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.8.0"
+version = "1.8.1"
 
 [[package]]
 category = "dev"
@@ -384,11 +462,11 @@ version = "2.5.0"
 [[package]]
 category = "main"
 description = "C parser in Python"
-marker = "sys_platform == \"win32\" and platform_python_implementation == \"CPython\""
+marker = "platform_python_implementation == \"CPython\" and sys_platform == \"win32\""
 name = "pycparser"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.19"
+version = "2.20"
 
 [[package]]
 category = "dev"
@@ -404,7 +482,7 @@ description = "Python client library for Kubernetes"
 name = "pykube-ng"
 optional = false
 python-versions = ">=3.6"
-version = "19.12.1"
+version = "20.4.1"
 
 [package.dependencies]
 pyyaml = "*"
@@ -419,7 +497,7 @@ description = "Python parsing module"
 name = "pyparsing"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.5"
+version = "2.4.7"
 
 [[package]]
 category = "dev"
@@ -427,7 +505,7 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.3.2"
+version = "5.4.1"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
@@ -444,6 +522,7 @@ python = "<3.8"
 version = ">=0.12"
 
 [package.extras]
+checkqa-mypy = ["mypy (v0.761)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
@@ -466,16 +545,16 @@ category = "main"
 description = "YAML parser and emitter for Python"
 name = "pyyaml"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "5.2"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "5.3.1"
 
 [[package]]
 category = "main"
 description = "Python client for Redis key-value store"
 name = "redis"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.3.11"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "3.4.1"
 
 [package.extras]
 hiredis = ["hiredis (>=0.1.3)"]
@@ -497,7 +576,7 @@ description = "Alternative regular expression module, to replace re."
 name = "regex"
 optional = false
 python-versions = "*"
-version = "2019.12.20"
+version = "2020.4.4"
 
 [[package]]
 category = "main"
@@ -505,16 +584,16 @@ description = "Python HTTP for Humans."
 name = "requests"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.22.0"
+version = "2.23.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<3.1.0"
-idna = ">=2.5,<2.9"
+chardet = ">=3.0.2,<4"
+idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
 [package.extras]
-security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
 socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
 
 [[package]]
@@ -537,8 +616,8 @@ category = "main"
 description = "Python 2 and 3 compatibility utilities"
 name = "six"
 optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "1.13.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "1.14.0"
 
 [[package]]
 category = "main"
@@ -568,7 +647,7 @@ description = "a fork of Python 2 and 3 ast modules with type comment support"
 name = "typed-ast"
 optional = false
 python-versions = "*"
-version = "1.4.0"
+version = "1.4.1"
 
 [[package]]
 category = "dev"
@@ -576,7 +655,7 @@ description = "Backported and Experimental Type Hints for Python 3.5+"
 name = "typing-extensions"
 optional = false
 python-versions = "*"
-version = "3.7.4.1"
+version = "3.7.4.2"
 
 [[package]]
 category = "main"
@@ -598,25 +677,46 @@ optional = false
 python-versions = "*"
 version = "2.4.3"
 
+[[package]]
+category = "dev"
+description = "Virtual Python Environment builder"
+name = "virtualenv"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+version = "20.0.18"
+
+[package.dependencies]
+appdirs = ">=1.4.3,<2"
+distlib = ">=0.3.0,<1"
+filelock = ">=3.0.0,<4"
+six = ">=1.9.0,<2"
+
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = ">=0.12,<2"
+
+[package.extras]
+docs = ["sphinx (>=2.0.0,<3)", "sphinx-argparse (>=0.2.5,<1)", "sphinx-rtd-theme (>=0.4.3,<1)", "towncrier (>=19.9.0rc1)", "proselint (>=0.10.2,<1)"]
+testing = ["pytest (>=4.0.0,<6)", "coverage (>=4.5.1,<6)", "pytest-mock (>=2.0.0,<3)", "pytest-env (>=0.6.2,<1)", "pytest-timeout (>=1.3.4,<2)", "packaging (>=20.0)", "xonsh (>=0.9.16,<1)"]
+
 [[package]]
 category = "dev"
 description = "Measures number of Terminal column cells of wide-character codes"
 name = "wcwidth"
 optional = false
 python-versions = "*"
-version = "0.1.7"
+version = "0.1.9"
 
 [[package]]
 category = "main"
 description = "The comprehensive WSGI web application library."
 name = "werkzeug"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.16.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "1.0.1"
 
 [package.extras]
-dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinx-issues"]
-termcolor = ["termcolor"]
+dev = ["pytest", "pytest-timeout", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinx-issues"]
 watchdog = ["watchdog"]
 
 [[package]]
@@ -625,18 +725,15 @@ description = "Backport of pathlib-compatible object wrapper for zip files"
 marker = "python_version < \"3.8\""
 name = "zipp"
 optional = false
-python-versions = ">=2.7"
-version = "0.6.0"
-
-[package.dependencies]
-more-itertools = "*"
+python-versions = ">=3.6"
+version = "3.1.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pathlib2", "contextlib2", "unittest2"]
+testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "b4f38cdf21a453cc828f14cfd209e4968ce7db806578ba07c9ea7f96948b09b4"
+content-hash = "2981660df485279d95321132a2b2d7e40651f5aaee50114b5f5ca0e9ee111a7d"
 python-versions = ">=3.7"
 
 [metadata.files]
@@ -644,6 +741,10 @@ appdirs = [
     {file = "appdirs-1.4.3-py2.py3-none-any.whl", hash = "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"},
     {file = "appdirs-1.4.3.tar.gz", hash = "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92"},
 ]
+"aspy.yaml" = [
+    {file = "aspy.yaml-1.3.0-py2.py3-none-any.whl", hash = "sha256:463372c043f70160a9ec950c3f1e4c3a82db5fca01d334b6bc89c7164d744bdc"},
+    {file = "aspy.yaml-1.3.0.tar.gz", hash = "sha256:e7c742382eff2caed61f87a39d13f99109088e5e93f04d76eb8d4b28aa143f45"},
+]
 atomicwrites = [
     {file = "atomicwrites-1.3.0-py2.py3-none-any.whl", hash = "sha256:03472c30eb2c5d1ba9227e4c2ca66ab8287fbfbbda3888aa93dc2e28fc6811b4"},
     {file = "atomicwrites-1.3.0.tar.gz", hash = "sha256:75a9445bac02d8d058d5e1fe689654ba5a6556a1dfd8ce6ec55a0ed79866cfa6"},
@@ -657,51 +758,50 @@ black = [
     {file = "black-19.10b0.tar.gz", hash = "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"},
 ]
 certifi = [
-    {file = "certifi-2019.11.28-py2.py3-none-any.whl", hash = "sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3"},
-    {file = "certifi-2019.11.28.tar.gz", hash = "sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f"},
+    {file = "certifi-2020.4.5.1-py2.py3-none-any.whl", hash = "sha256:1d987a998c75633c40847cc966fcf5904906c920a7f17ef374f5aa4282abd304"},
+    {file = "certifi-2020.4.5.1.tar.gz", hash = "sha256:51fcb31174be6e6664c5f69e3e1691a2d72a1a12e90f872cbdb1567eb47b6519"},
 ]
 cffi = [
-    {file = "cffi-1.13.2-cp27-cp27m-macosx_10_6_intel.whl", hash = "sha256:3c9fff570f13480b201e9ab69453108f6d98244a7f495e91b6c654a47486ba43"},
-    {file = "cffi-1.13.2-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:2c5e309ec482556397cb21ede0350c5e82f0eb2621de04b2633588d118da4396"},
-    {file = "cffi-1.13.2-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:19db0cdd6e516f13329cba4903368bff9bb5a9331d3410b1b448daaadc495e54"},
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+    {file = "typed_ast-1.4.1-cp36-cp36m-win_amd64.whl", hash = "sha256:249862707802d40f7f29f6e1aad8d84b5aa9e44552d2cc17384b209f091276aa"},
+    {file = "typed_ast-1.4.1-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:8ce678dbaf790dbdb3eba24056d5364fb45944f33553dd5869b7580cdbb83614"},
+    {file = "typed_ast-1.4.1-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:c9e348e02e4d2b4a8b2eedb48210430658df6951fa484e59de33ff773fbd4b41"},
+    {file = "typed_ast-1.4.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:bcd3b13b56ea479b3650b82cabd6b5343a625b0ced5429e4ccad28a8973f301b"},
+    {file = "typed_ast-1.4.1-cp37-cp37m-win32.whl", hash = "sha256:d5d33e9e7af3b34a40dc05f498939f0ebf187f07c385fd58d591c533ad8562fe"},
+    {file = "typed_ast-1.4.1-cp37-cp37m-win_amd64.whl", hash = "sha256:0666aa36131496aed8f7be0410ff974562ab7eeac11ef351def9ea6fa28f6355"},
+    {file = "typed_ast-1.4.1-cp38-cp38-macosx_10_15_x86_64.whl", hash = "sha256:d205b1b46085271b4e15f670058ce182bd1199e56b317bf2ec004b6a44f911f6"},
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+    {file = "typed_ast-1.4.1-cp38-cp38-win32.whl", hash = "sha256:715ff2f2df46121071622063fc7543d9b1fd19ebfc4f5c8895af64a77a8c852c"},
+    {file = "typed_ast-1.4.1-cp38-cp38-win_amd64.whl", hash = "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4"},
+    {file = "typed_ast-1.4.1-cp39-cp39-macosx_10_15_x86_64.whl", hash = "sha256:d43943ef777f9a1c42bf4e552ba23ac77a6351de620aa9acf64ad54933ad4d34"},
+    {file = "typed_ast-1.4.1.tar.gz", hash = "sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b"},
 ]
 typing-extensions = [
-    {file = "typing_extensions-3.7.4.1-py2-none-any.whl", hash = "sha256:910f4656f54de5993ad9304959ce9bb903f90aadc7c67a0bef07e678014e892d"},
-    {file = "typing_extensions-3.7.4.1-py3-none-any.whl", hash = "sha256:cf8b63fedea4d89bab840ecbb93e75578af28f76f66c35889bd7065f5af88575"},
-    {file = "typing_extensions-3.7.4.1.tar.gz", hash = "sha256:091ecc894d5e908ac75209f10d5b4f118fbdb2eb1ede6a63544054bb1edb41f2"},
+    {file = "typing_extensions-3.7.4.2-py2-none-any.whl", hash = "sha256:f8d2bd89d25bc39dabe7d23df520442fa1d8969b82544370e03d88b5a591c392"},
+    {file = "typing_extensions-3.7.4.2-py3-none-any.whl", hash = "sha256:6e95524d8a547a91e08f404ae485bbb71962de46967e1b71a0cb89af24e761c5"},
+    {file = "typing_extensions-3.7.4.2.tar.gz", hash = "sha256:79ee589a3caca649a9bfd2a8de4709837400dfa00b6cc81962a1e6a1815969ae"},
 ]
 urllib3 = [
     {file = "urllib3-1.22-py2.py3-none-any.whl", hash = "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b"},
@@ -1042,15 +1164,19 @@ urllib3 = [
 urlobject = [
     {file = "URLObject-2.4.3.tar.gz", hash = "sha256:47b2e20e6ab9c8366b2f4a3566b6ff4053025dad311c4bb71279bbcfa2430caa"},
 ]
+virtualenv = [
+    {file = "virtualenv-20.0.18-py2.py3-none-any.whl", hash = "sha256:5021396e8f03d0d002a770da90e31e61159684db2859d0ba4850fbea752aa675"},
+    {file = "virtualenv-20.0.18.tar.gz", hash = "sha256:ac53ade75ca189bc97b6c1d9ec0f1a50efe33cbf178ae09452dcd9fd309013c1"},
+]
 wcwidth = [
-    {file = "wcwidth-0.1.7-py2.py3-none-any.whl", hash = "sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c"},
-    {file = "wcwidth-0.1.7.tar.gz", hash = "sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e"},
+    {file = "wcwidth-0.1.9-py2.py3-none-any.whl", hash = "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1"},
+    {file = "wcwidth-0.1.9.tar.gz", hash = "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"},
 ]
 werkzeug = [
-    {file = "Werkzeug-0.16.0-py2.py3-none-any.whl", hash = "sha256:e5f4a1f98b52b18a93da705a7458e55afb26f32bff83ff5d19189f92462d65c4"},
-    {file = "Werkzeug-0.16.0.tar.gz", hash = "sha256:7280924747b5733b246fe23972186c6b348f9ae29724135a6dfc1e53cea433e7"},
+    {file = "Werkzeug-1.0.1-py2.py3-none-any.whl", hash = "sha256:2de2a5db0baeae7b2d2664949077c2ac63fbd16d98da0ff71837f7d1dea3fd43"},
+    {file = "Werkzeug-1.0.1.tar.gz", hash = "sha256:6c80b1e5ad3665290ea39320b91e1be1e0d5f60652b964a3070216de83d2e47c"},
 ]
 zipp = [
-    {file = "zipp-0.6.0-py2.py3-none-any.whl", hash = "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"},
-    {file = "zipp-0.6.0.tar.gz", hash = "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e"},
+    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
+    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index dfc5d7e..d1a64f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,3 +24,4 @@ pytest = "*"
 pytest-cov = "*"
 black = "^19.10b0"
 mypy = "^0.761"
+pre-commit = "^1.21.0"
diff --git a/tests/test_mock.py b/tests/test_mock.py
index 0c57cf6..6cbfe7e 100644
--- a/tests/test_mock.py
+++ b/tests/test_mock.py
@@ -6,4 +6,4 @@ def test_query_mock_clusters():
     discoverer = MockDiscoverer()
     for cluster in discoverer.get_clusters():
         data = query_mock_cluster(cluster)
-        assert data['id'].startswith('mock-cluster-')
+        assert data["id"].startswith("mock-cluster-")