diff --git a/.github/workflows/build-tomcat.yml b/.github/workflows/build-tomcat.yml
index d7a9996..3d24587 100755
--- a/.github/workflows/build-tomcat.yml
+++ b/.github/workflows/build-tomcat.yml
@@ -20,7 +20,7 @@ jobs:
       uses: actions/checkout@v2
       with:
         repository: apache/tomcat # Repository name with owner
-        ref: master               # The branch, tag or SHA to checkout
+        ref: main              # The branch, tag or SHA to checkout
         path: ./tomcat            # Relative path under $GITHUB_WORKSPACE
 
     - name: Setup Java 9