diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 12556680..e42e9a53 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     strategy:
       matrix:
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 6795255a..fad31f94 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   check:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     strategy:
       fail-fast: false
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 0fc6d770..20503234 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -13,7 +13,7 @@ on:
 jobs:
   analyze:
     name: Analyze
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     strategy:
       fail-fast: false
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 0791cd1e..882eb82f 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   test-frontend:
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v2