diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d7011283cc4..f0d67b31b9e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -79,7 +79,7 @@ jobs:
             skip-archive: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Cache west modules
         uses: actions/cache@v2
         env:
diff --git a/.github/workflows/clang-format-lint.yml b/.github/workflows/clang-format-lint.yml
index b6d515c182e..813d432c21b 100644
--- a/.github/workflows/clang-format-lint.yml
+++ b/.github/workflows/clang-format-lint.yml
@@ -22,7 +22,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: DoozyX/clang-format-lint-action@v0.11
         with:
           source: "./app"
diff --git a/.github/workflows/doc-checks.yml b/.github/workflows/doc-checks.yml
index b5b278e9414..da503a80cd8 100644
--- a/.github/workflows/doc-checks.yml
+++ b/.github/workflows/doc-checks.yml
@@ -14,7 +14,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: bahmutov/npm-install@v1
         with:
           working-directory: docs
@@ -24,7 +24,7 @@ jobs:
   prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: bahmutov/npm-install@v1
         with:
           working-directory: docs
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2f7992cec70..82ece7ccdfe 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
       image: zmkfirmware/zmk-build-arm:2.4
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Cache west modules
         uses: actions/cache@v2
         env: