diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8d5a07b..0b83bd7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ on: [pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/replica-tests.yml b/.github/workflows/replica-tests.yml
index e28c2bc..0a82f00 100644
--- a/.github/workflows/replica-tests.yml
+++ b/.github/workflows/replica-tests.yml
@@ -5,7 +5,7 @@ on: [pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         version: [mysql-5.7.25,mysql-8.0.16]