diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a924b07..6988370 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Install rust toolchain
         uses: actions-rs/toolchain@v1.0.7
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Install rust toolchain
         uses: actions-rs/toolchain@v1.0.7
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Install rust toolchain
         uses: actions-rs/toolchain@v1.0.7
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8305c1f..bddab11 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -46,7 +46,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Install rust toolchain
         uses: actions-rs/toolchain@v1.0.7
@@ -81,7 +81,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Install rust toolchain
         uses: actions-rs/toolchain@v1.0.7