diff --git a/.github/workflows/build-master.yml b/.github/workflows/build-master.yml
index 819f0680b2..6a8252179c 100644
--- a/.github/workflows/build-master.yml
+++ b/.github/workflows/build-master.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   build-static-page:
     name: build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     timeout-minutes: 10
     env:
       DOCKER_BUILDKIT: '1'
diff --git a/.github/workflows/build-pr.yml b/.github/workflows/build-pr.yml
index 839b105d6e..c3723a544d 100644
--- a/.github/workflows/build-pr.yml
+++ b/.github/workflows/build-pr.yml
@@ -5,7 +5,7 @@ on: pull_request
 jobs:
   build-static-page:
     name: build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     env:
       DOCKER_BUILDKIT: '1'
     steps:
diff --git a/.github/workflows/build-published.yml b/.github/workflows/build-published.yml
index b56a7cff98..7c330c582c 100644
--- a/.github/workflows/build-published.yml
+++ b/.github/workflows/build-published.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   build-static-page:
     name: build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     timeout-minutes: 10
     env:
       DOCKER_BUILDKIT: '1'
diff --git a/.github/workflows/clean-pr.yml b/.github/workflows/clean-pr.yml
index 7faf4a89d8..9f5dab6672 100644
--- a/.github/workflows/clean-pr.yml
+++ b/.github/workflows/clean-pr.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   remove-site-from-netlify:
     name: build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     if: github.event.pull_request.head.repo.fork == false
     steps:
       - uses: actions/checkout@v2