diff --git a/.github/workflows/code-coverage.yml b/.github/workflows/code-coverage.yml
index 296a75d2d..951fb6c65 100644
--- a/.github/workflows/code-coverage.yml
+++ b/.github/workflows/code-coverage.yml
@@ -2,7 +2,7 @@ name: Code coverage
 on: [push, pull_request]
 jobs:
   run:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v3