diff --git a/.github/workflows/ansible-debian-buster.yml b/.github/workflows/ansible-debian-buster.yml
index d76b02c..5aca449 100644
--- a/.github/workflows/ansible-debian-buster.yml
+++ b/.github/workflows/ansible-debian-buster.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with debian:buster
         uses: roles-ansible/check-ansible-debian-buster-action@master
diff --git a/.github/workflows/ansible-debian-latest.yml b/.github/workflows/ansible-debian-latest.yml
index f7eb5b6..f561830 100644
--- a/.github/workflows/ansible-debian-latest.yml
+++ b/.github/workflows/ansible-debian-latest.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with debian:latest
         uses: roles-ansible/check-ansible-debian-latest-action@master
diff --git a/.github/workflows/ansible-debian-sid.yml b/.github/workflows/ansible-debian-sid.yml
index 2e3215a..3ebfd1f 100644
--- a/.github/workflows/ansible-debian-sid.yml
+++ b/.github/workflows/ansible-debian-sid.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with debian:sid
         uses: roles-ansible/check-ansible-debian-sid-action@master
diff --git a/.github/workflows/ansible-debian-stable.yml b/.github/workflows/ansible-debian-stable.yml
index e47f773..c0076d8 100644
--- a/.github/workflows/ansible-debian-stable.yml
+++ b/.github/workflows/ansible-debian-stable.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with debian:stable
         uses: roles-ansible/check-ansible-debian-stable-action@master
diff --git a/.github/workflows/ansible-debian-stretch.yml b/.github/workflows/ansible-debian-stretch.yml
index c947cae..65dccd4 100644
--- a/.github/workflows/ansible-debian-stretch.yml
+++ b/.github/workflows/ansible-debian-stretch.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with debian:stretch
         uses: roles-ansible/check-ansible-debian-stretch-action@master
diff --git a/.github/workflows/ansible-linting-check.yml b/.github/workflows/ansible-linting-check.yml
index 41dcb97..4fba5ee 100644
--- a/.github/workflows/ansible-linting-check.yml
+++ b/.github/workflows/ansible-linting-check.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Lint Ansible Playbook
         uses: ansible/ansible-lint-action@master
diff --git a/.github/workflows/ansible-ubuntu-latest.yml b/.github/workflows/ansible-ubuntu-latest.yml
index b9544a5..763f01e 100644
--- a/.github/workflows/ansible-ubuntu-latest.yml
+++ b/.github/workflows/ansible-ubuntu-latest.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with ubuntu:latest
         uses: roles-ansible/check-ansible-ubuntu-latest-action@master
diff --git a/.github/workflows/ansible-ubuntu-trusty.yml b/.github/workflows/ansible-ubuntu-trusty.yml
index 6cde8b8..a136f77 100644
--- a/.github/workflows/ansible-ubuntu-trusty.yml
+++ b/.github/workflows/ansible-ubuntu-trusty.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: ansible check with ubuntu:trusty
         uses: roles-ansible/check-ansible-ubuntu-trusty-action@master
diff --git a/.github/workflows/yamllint.yaml b/.github/workflows/yamllint.yaml
index 39c49f8..d5057ff 100644
--- a/.github/workflows/yamllint.yaml
+++ b/.github/workflows/yamllint.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@master
+        uses: actions/checkout@v2.3.4
       - name: 'Yamllint'
         uses: karancode/yamllint-github-action@master
         with: