diff --git a/.github/workflows/backend-prod-cd.yml b/.github/workflows/backend-prod-cd.yml
index 1ac77fd3..c1c10c3b 100644
--- a/.github/workflows/backend-prod-cd.yml
+++ b/.github/workflows/backend-prod-cd.yml
@@ -89,7 +89,7 @@ jobs:
         runner: [ prod-a, prod-b ]
       # fail-fast 옵션을 명시적으로 설정
       fail-fast: true
-    runs-on: [ self-hosted, linux, ARM64, ${ { matrix.runner } } ]
+    runs-on: [ self-hosted, linux, ARM64, "${{ matrix.runner }}" ]
     defaults:
       run:
         shell: bash