diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c8a8e0e..7229daf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   coverage:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it