diff --git a/.github/workflows/compliance.yml b/.github/workflows/compliance.yml
index 3ce717805..75f3cdab0 100644
--- a/.github/workflows/compliance.yml
+++ b/.github/workflows/compliance.yml
@@ -21,7 +21,7 @@ jobs:
     env:
       H2SPEC_VERSION: '2.6.0'
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: Install h2spec
       run: |
         curl -fsSL https://github.com/summerwind/h2spec/releases/download/v${H2SPEC_VERSION}/h2spec_linux_amd64.tar.gz -o h2spec.tar.gz
diff --git a/.github/workflows/musl.yml b/.github/workflows/musl.yml
index c106b1d05..aba3f4e14 100644
--- a/.github/workflows/musl.yml
+++ b/.github/workflows/musl.yml
@@ -13,7 +13,7 @@ jobs:
       container:
         image: alpine:latest
       steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v2
       - name: Install dependencies
         run: apk add gcc make tar git python3 libc-dev linux-headers pcre-dev pcre2-dev openssl-dev lua5.3-dev grep socat curl
       - name: Install VTest
diff --git a/.github/workflows/openssl-nodeprecated.yml b/.github/workflows/openssl-nodeprecated.yml
index e62dbf0d8..e423f58dd 100644
--- a/.github/workflows/openssl-nodeprecated.yml
+++ b/.github/workflows/openssl-nodeprecated.yml
@@ -21,7 +21,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: Install VTest
       run: |
         scripts/build-vtest.sh