diff --git a/.github/workflows/PackageCI.yml b/.github/workflows/PackageCI.yml
index 87d9dbc..65da541 100644
--- a/.github/workflows/PackageCI.yml
+++ b/.github/workflows/PackageCI.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0 # avoid shallow clone so nbgv can do its work
         
diff --git a/.github/workflows/PrCheck.yml b/.github/workflows/PrCheck.yml
index 55c75bf..926a89e 100644
--- a/.github/workflows/PrCheck.yml
+++ b/.github/workflows/PrCheck.yml
@@ -10,7 +10,7 @@ jobs:
     
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
@@ -44,7 +44,7 @@ jobs:
         
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0