diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..cef9bc9
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,41 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    - cron: "11 13 * * 3"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ python ]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+          queries: +security-and-quality
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "/language:${{ matrix.language }}"
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index e19bba2..56336f6 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: ['3.7', '3.8', '3.9']
         WITH_PANDAS: [false, true]
 
     steps:
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 1cda5fb..ab92fc7 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.38.4
 watchdog==2.1.9
 flake8==5.0.4
 tox==3.26.0
-coverage==6.5.0
+coverage==7.2.2
 cryptography==40.0.1
 Sphinx==5.3.0
 PyYAML==6.0
@@ -12,4 +12,4 @@ pytest==7.1.3
 pytest-runner==6.0.0
 vcrpy==2.1.1
 twine==4.0.2
-black==22.10.0
+black==23.1.0
diff --git a/tiingo/api.py b/tiingo/api.py
index 9bd90b2..11f647c 100644
--- a/tiingo/api.py
+++ b/tiingo/api.py
@@ -265,7 +265,6 @@ class TiingoClient(RestClient):
         frequency="daily",
         fmt="json",
     ):
-
         """Return a pandas.DataFrame of historical prices for one or more ticker symbols.
 
         By default, return latest EOD Composite Price for a list of stock tickers.
diff --git a/tiingo/wsclient.py b/tiingo/wsclient.py
index 63a7ff1..2f3ec6a 100644
--- a/tiingo/wsclient.py
+++ b/tiingo/wsclient.py
@@ -40,7 +40,6 @@ class TiingoWebsocketClient:
     """
 
     def __init__(self, config=None, endpoint=None, on_msg_cb=None):
-
         self._base_url = "wss://api.tiingo.com"
         self.config = {} if config is None else config