diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index a252f7dca..eb7ad268d 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -208,7 +208,7 @@ jobs:
   ########################
   integration-test-postgres:
     name: run itests postgres
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: git checkout
         uses: actions/checkout@v3