diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index c3b9608..c210c2a 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     timeout-minutes: 10
 
     steps:
diff --git a/.github/workflows/go-test.yml b/.github/workflows/go-test.yml
index 3c18430..3c50b15 100644
--- a/.github/workflows/go-test.yml
+++ b/.github/workflows/go-test.yml
@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v1
@@ -21,4 +21,3 @@ jobs:
 
     - name: test
       run: go test ./...
-
diff --git a/.github/workflows/integration-test.yml b/.github/workflows/integration-test.yml
index b0399ce..3a72e62 100644
--- a/.github/workflows/integration-test.yml
+++ b/.github/workflows/integration-test.yml
@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     timeout-minutes: 10
 
     steps:
diff --git a/.github/workflows/jshint.yml b/.github/workflows/jshint.yml
index 21e690f..834a388 100644
--- a/.github/workflows/jshint.yml
+++ b/.github/workflows/jshint.yml
@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0aa7d6b..638bc95 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v1