diff --git a/.kapetanios/postsubmit.yaml b/.kapetanios/postsubmit.yaml
index e9a42e42d0..67f7b32e20 100644
--- a/.kapetanios/postsubmit.yaml
+++ b/.kapetanios/postsubmit.yaml
@@ -114,8 +114,11 @@ spec:
         description: Build static files
         runner: gcr.io/pipecd/runner:1.0.0
         commands:
-          - bazelisk build //pkg/app/web:public_files --action_env=ENABLE_MOCK=true
+          - bazelisk --output_base=/workspace/bazel_out build --config=ci //pkg/app/web:public_files --action_env=ENABLE_MOCK=true
           - cp -rf $(bazelisk info bazel-bin)/pkg/app/web/public_files ./play/public
+        secrets:
+          - name: bazel_cache_service_account
+            type: PROJECT
       - name: docker-build
         description: Build docker image
         runner: gcr.io/cloud-builders/docker