diff --git a/.github/workflows/ecr.yml b/.github/workflows/ecr.yml
index 51582aa..0813bc2 100644
--- a/.github/workflows/ecr.yml
+++ b/.github/workflows/ecr.yml
@@ -29,11 +29,11 @@ jobs:
           sudo apt-get update -y
           sudo apt-get install -y jq
 
-      # 멀티아치 에뮬레이션(QEMU) 세팅
+      # GitHub Actions의 amd64 러너에서 Graviton(arm64) 이미지를 빌드하기 위한 QEMU 세팅
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
         with:
-          platforms: all
+          platforms: arm64
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -53,7 +53,7 @@ jobs:
         id: tag
         run: echo "TAG=${GITHUB_SHA::12}" >> $GITHUB_OUTPUT
 
-      - name: Build & Push multi-arch image
+      - name: Build & Push ARM64 image
         id: build
         run: |
           set -e
@@ -63,7 +63,7 @@ jobs:
           LATEST_URI="$REGISTRY/${{ env.ECR_REPOSITORY }}:latest"
 
           docker buildx build \
-            --platform linux/amd64,linux/arm64 \
+            --platform linux/arm64 \
             --push \
             --tag "$IMAGE_URI" \
             --tag "$LATEST_URI" \
@@ -71,7 +71,7 @@ jobs:
 
           echo "IMAGE_URI=$IMAGE_URI" >> $GITHUB_OUTPUT
 
-      - name: Verify multi-arch manifest (Fixed)
+      - name: Verify ARM64 manifest
         run: |
           set -e
           REGISTRY="${{ steps.ecr.outputs.registry }}"
@@ -83,19 +83,13 @@ jobs:
           echo "$ARCHES"
 
           # 정확한 매칭으로 수정
-          if ! echo "$ARCHES" | grep -x 'linux/amd64' > /dev/null; then
-            echo "❌ Missing linux/amd64 in manifest"
-            echo "Available platforms: $ARCHES"
-            exit 1
-          fi
-
           if ! echo "$ARCHES" | grep -x 'linux/arm64' > /dev/null; then
             echo "❌ Missing linux/arm64 in manifest"
             echo "Available platforms: $ARCHES"
             exit 1
           fi
 
-          echo "✅ Both linux/amd64 and linux/arm64 found"
+          echo "✅ linux/arm64 found"
 
       # repository_dispatch 전송 + HTTP 204 확인
       - name: Trigger ECS/EC2 Deploy via repository_dispatch
@@ -125,10 +119,10 @@ jobs:
 
       - name: Summary
         run: |
-          echo "### ✅ ECR Push & Dispatch OK (Multi-arch)" >> $GITHUB_STEP_SUMMARY
+          echo "### ✅ ECR Push & Dispatch OK (ARM64)" >> $GITHUB_STEP_SUMMARY
           echo "- Repo:   \`${{ env.ECR_REPOSITORY }}\`" >> $GITHUB_STEP_SUMMARY
           echo "- Tag:    \`${{ steps.tag.outputs.TAG }}\`" >> $GITHUB_STEP_SUMMARY
           echo "- Image:  \`${{ steps.build.outputs.IMAGE_URI }}\`" >> $GITHUB_STEP_SUMMARY
-          echo "- Arches: \`linux/amd64, linux/arm64\`" >> $GITHUB_STEP_SUMMARY
+          echo "- Arch:   \`linux/arm64\`" >> $GITHUB_STEP_SUMMARY
           # echo "- Sent:   \`repository_dispatch: deploy-ecs\`" >> $GITHUB_STEP_SUMMARY
           echo "- Sent:   \`repository_dispatch: deploy-ec2\`" >> $GITHUB_STEP_SUMMARY