diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 85662c9f7..460916b66 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.3
         with:
           submodules: true
 
diff --git a/.github/workflows/check-formatting.yml b/.github/workflows/check-formatting.yml
index a8da9af8e..4d2659a33 100644
--- a/.github/workflows/check-formatting.yml
+++ b/.github/workflows/check-formatting.yml
@@ -14,7 +14,7 @@ jobs:
       image: ubuntu:19.10
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.3
     - name: apt-get update
       run: apt-get update