diff --git a/.github/workflows/update_submodule.yml b/.github/workflows/update_submodule.yml
index 6ed5d33..81bbcd7 100644
--- a/.github/workflows/update_submodule.yml
+++ b/.github/workflows/update_submodule.yml
@@ -27,7 +27,12 @@ jobs:
       - name: Update submodule
         run: git submodule update --init --recursive --remote -f
 
+      - name: Check if there are changes
+        id: check_changes
+        run: echo ::set-output name=changes::$(git status --porcelain)
+
       - name: Commit changes
+        if: ${{ steps.check_changes.outputs.changes != '' }}
         run: |
           git add .
           git commit -m "Update submodule to latest commit"