diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 5902789..54d01b7 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Check for C# sources
         id: csharp_sources
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 6ad0e02..f099ffa 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -41,7 +41,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           # Sourcelink embeds the commit; full history isn't required but
           # fetch-depth: 0 makes git describe usable if we want it later.
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3fa663f..02d4650 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -46,7 +46,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1