diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3672a487..da84ed10 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,6 @@ jobs:
     - uses: actions/checkout@v1
     - name: Set up tools
       run: |
-        sudo apt-add-repository -y ppa:deadsnakes/ppa
         sudo apt-get -y install python3.7 python3.7-dev python3-pip python3-setuptools
         python3.7 -m pip install pylint mypy typing-extensions pytz yapf
     - name: Run checks