diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9f485213..fe711895 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
 
       - name: Set up Python 3.9
         uses: actions/setup-python@v2.2.2
@@ -67,7 +67,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
 
       - name: Set up Python 3.9
         uses: actions/setup-python@v2.2.2
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 11f3d39e..c836edc9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,7 +57,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
         with:
           fetch-depth: 5
 
diff --git a/.github/workflows/cs.yml b/.github/workflows/cs.yml
index e1e721ca..e4283d10 100644
--- a/.github/workflows/cs.yml
+++ b/.github/workflows/cs.yml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
 
       - name: Set up Python 3.9
         uses: actions/setup-python@v2.2.2
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 2c31930a..5c68593c 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
 
       - name: Set up Python 3.8
         uses: actions/setup-python@v2.2.2