diff --git a/.gitignore b/.gitignore
index 208f32a5..116a03ff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,7 @@ clean.sh
 .pylintrc
 .pytest_cache
 .python-version
+.pre-commit-config.yaml
 dist
 _build
 .tags
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f757dab4..c35c4f9c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,6 +23,7 @@ test:format:
   stage: test
   image: python:3.8
   script:
+  - pip install black
   - black --check .
   tags:
   - lint
diff --git a/README.rst b/README.rst
index 0adb2681..7ac998d5 100644
--- a/README.rst
+++ b/README.rst
@@ -1,7 +1,7 @@
 Burp-UI
 =======
 
-.. image:: https://git.ziirish.me/ziirish/burp-ui/badges/master/build.svg
+.. image:: https://git.ziirish.me/ziirish/burp-ui/badges/master/pipeline.svg
     :target: https://git.ziirish.me/ziirish/burp-ui/pipelines
     :alt: Build Status
 
diff --git a/burpui/extensions.py b/burpui/extensions.py
index d797cf64..46883867 100644
--- a/burpui/extensions.py
+++ b/burpui/extensions.py
@@ -16,9 +16,9 @@ from ._compat import to_unicode
 
 def parse_db_setting(string):
     parts = re.search(
-        "(?:(?P<backend>\w+)(?:\+(?P<driver>\w+))?://)?"
-        "(?:(?P<user>\w+)(?::?(?P<pass>.+))?@)?"
-        "(?P<host>[\w_.-]+):?(?P<port>\d+)?(?:/(?P<db>\w+))?",
+        r"(?:(?P<backend>\w+)(?:\+(?P<driver>\w+))?://)?"
+        r"(?:(?P<user>\w+)(?::?(?P<pass>.+))?@)?"
+        r"(?P<host>[\w_.-]+):?(?P<port>\d+)?(?:/(?P<db>\w+))?",
         string,
     )
     if not parts:  # pragma: no cover
diff --git a/tox.ini b/tox.ini
index e0de3728..316c4358 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ commands = flake8
 
 [flake8]
 exclude = .tox,docs,migrations,.git,docker,pkgs
-extend-ignore = E203
-max-line-length = 88
+extend-ignore = E203,E722,E402,E501
+max-line-length = 120
 show-source = true
 application-import-names = burpui