diff --git a/.github/workflows/hexpm-release.yml b/.github/workflows/hexpm-release.yml
index 99f7e56..8a17b05 100644
--- a/.github/workflows/hexpm-release.yml
+++ b/.github/workflows/hexpm-release.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Check out
         uses: actions/checkout@v2