diff --git a/.github/workflows/update-packages.yml b/.github/workflows/update-packages.yml
index c6daac9..c253391 100644
--- a/.github/workflows/update-packages.yml
+++ b/.github/workflows/update-packages.yml
@@ -41,11 +41,11 @@ jobs:
         if: steps.git-check.outputs.changes == 'true'
         run: |
           if [ -f "temp/commit-msg.txt" ]; then
-            echo "message<<EOF" >> $GITHUB_OUTPUT
-            cat temp/commit-msg.txt >> $GITHUB_OUTPUT
-            echo "EOF" >> $GITHUB_OUTPUT
+            echo "message<<EOF" >> "$GITHUB_OUTPUT"
+            cat temp/commit-msg.txt >> "$GITHUB_OUTPUT"
+            echo "EOF" >> "$GITHUB_OUTPUT"
           else
-            echo "message=chore(packages): update MCP package list" >> $GITHUB_OUTPUT
+            echo "message=chore(packages): update MCP package list" >> "$GITHUB_OUTPUT"
           fi
 
       - name: Remove temp files