diff --git a/.github/workflows/android-macOS.yml b/.github/workflows/android-macOS.yml
index a941fb4..14414fb 100644
--- a/.github/workflows/android-macOS.yml
+++ b/.github/workflows/android-macOS.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: macOS-latest
     timeout-minutes: 30
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
       with:
         submodules: true
     - run: make init
diff --git a/.github/workflows/android-windows.yml b/.github/workflows/android-windows.yml
index 3e2484e..a7aa49c 100644
--- a/.github/workflows/android-windows.yml
+++ b/.github/workflows/android-windows.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 30
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
       with:
         submodules: true
     - run: make init