diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index fb6cba5c28..393796630a 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -14,6 +14,7 @@ jobs:
         ruby-version: 2.6.x
     - name: Install required package
       run: |
+        sudo rm -f /etc/apt/sources.list.d/dotnetdev.list /etc/apt/sources.list.d/microsoft-prod.list
         sudo apt-get update
         sudo apt-get install libmysqlclient-dev libpq-dev libsqlite3-dev libncurses5-dev
     - name: Cache gems