diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 23ad306..d3fc9cf 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Set up cache for ~./m2/repository
         uses: actions/cache@v2.1.4