diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b5e6396..0c824cf 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -32,7 +32,7 @@ jobs:
     steps:
 
       - name: Acquire sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Graphviz
         uses: ts-graphviz/setup-graphviz@v2