diff --git a/.github/workflows/ci_docker_build.yml b/.github/workflows/ci_docker_build.yml
index 58d1512e7..2b4dd6806 100644
--- a/.github/workflows/ci_docker_build.yml
+++ b/.github/workflows/ci_docker_build.yml
@@ -12,6 +12,9 @@ jobs:
     if: needs.info.outputs.name || needs.info.outputs.new_tag
     env:
       IMAGE_NAME: reearth/reearth
+    defaults:
+      run:
+        working-directory: server
     steps:
       - name: Checkout
         uses: actions/checkout@v2