diff --git a/.forgejo/workflows/main.yml b/.forgejo/workflows/main.yml
index 19f5a27..46df0e8 100644
--- a/.forgejo/workflows/main.yml
+++ b/.forgejo/workflows/main.yml
@@ -24,27 +24,22 @@ jobs:
           git remote add upstream https://github.com/cinnyapp/cinny.git
           git fetch upstream dev
 
-      - name: Check for Changes and Push Branch
+      - name: Merge Upstream and Check Changes
         id: check_changes
         run: |
-          # 1. 로컬에 올라가 있는 'origin/dev'와 'upstream/dev'의 최신 커밋 해시를 비교합니다.
-          LOCAL_REFS=$(git rev-parse origin/dev)
-          UPSTREAM_REFS=$(git rev-parse upstream/dev)
+          BRANCH_NAME="upstream-sync-$(date +'%Y%m%d%H%M')"
+          git checkout -b $BRANCH_NAME origin/dev
           
-          if [ "$LOCAL_REFS" != "$UPSTREAM_REFS" ]; then
-            echo "New changes detected in upstream."
-            
-            BRANCH_NAME="upstream-sync-$(date +'%Y%m%d%H%M')"
+          git merge upstream/dev --no-edit --allow-unrelated-histories
+          
+          if ! git diff --quiet origin/dev HEAD; then
+            echo "New upstream changes merged successfully."
             echo "branch_name=$BRANCH_NAME" >> $GITHUB_OUTPUT
             echo "has_changes=true" >> $GITHUB_OUTPUT
             
-            # 2. 관련 없는 히스토리 문제를 피하기 위해, 'upstream/dev'에서 직접 새 브랜치를 생성합니다.
-            git checkout -b $BRANCH_NAME upstream/dev
-            
-            # 3. 생성한 브랜치를 원격(origin)에 푸시합니다.
             git push origin $BRANCH_NAME
           else
-            echo "No changes detected. Everything is up to date."
+            echo "No new upstream changes to apply. Everything is up to date."
             echo "has_changes=false" >> $GITHUB_OUTPUT
           fi
 
@@ -52,7 +47,7 @@ jobs:
         if: ${{ steps.check_changes.outputs.has_changes == 'true' }}
         run: |      
           PR_TITLE="chore(deps): sync upstream changes ($(date +'%Y-%m-%d'))"
-          PR_BODY="Upstream (cinnyapp/cinny)에 새로운 변경사항이 감지되어 자동으로 생성된 PR입니다."
+          PR_BODY="Upstream (cinnyapp/cinny)에 새로운 변경사항이 감지되어 내 커스텀 브랜치(dev)에 병합한 후 생성된 PR입니다."
           HEAD_BRANCH="${{ steps.check_changes.outputs.branch_name }}"
           BASE_BRANCH="dev"