diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f2e68544..ef02e953 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   lint:
     continue-on-error: true
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -21,7 +21,7 @@ jobs:
       - run: npm run lint
 
   unit-tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -38,7 +38,7 @@ jobs:
 
   mutation-tests:
     continue-on-error: true
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -52,7 +52,7 @@ jobs:
       - run: npm run mutate -- --mutate=$(git diff origin/main --name-only | grep -E 'src\/(.*).(ts|tsx)$' | paste -sd ",")
 
   build-docker-image:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
diff --git a/.github/workflows/docker-image-build.yml b/.github/workflows/docker-image-build.yml
index 50a0d4ba..36ff3809 100644
--- a/.github/workflows/docker-image-build.yml
+++ b/.github/workflows/docker-image-build.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
diff --git a/.github/workflows/publish-release.yml b/.github/workflows/publish-release.yml
index 5f857f89..fac8fded 100644
--- a/.github/workflows/publish-release.yml
+++ b/.github/workflows/publish-release.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2