diff --git a/.github/workflows/ce-dev-PR-test.yml b/.github/workflows/ce-dev-PR-test.yml
index 9dd4099..cb3be05 100644
--- a/.github/workflows/ce-dev-PR-test.yml
+++ b/.github/workflows/ce-dev-PR-test.yml
@@ -5,7 +5,7 @@ on: pull_request
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Install modules
diff --git a/.github/workflows/ce-dev-build.yml b/.github/workflows/ce-dev-build.yml
index da625f6..877a199 100644
--- a/.github/workflows/ce-dev-build.yml
+++ b/.github/workflows/ce-dev-build.yml
@@ -11,7 +11,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Install modules
diff --git a/.github/workflows/ce-dev-test.yml b/.github/workflows/ce-dev-test.yml
index 3474f04..9eb8fdc 100644
--- a/.github/workflows/ce-dev-test.yml
+++ b/.github/workflows/ce-dev-test.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
         with: