diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 983ca5175e3..5ea8126adf6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1619,7 +1619,7 @@ jobs:
         env:
           ADDITIONAL_CHECK_GROUP: ${{ matrix.group }}
           RUN_CONTROL_UI_I18N: ${{ needs.preflight.outputs.run_control_ui_i18n }}
-          OPENCLAW_EXTENSION_BOUNDARY_CONCURRENCY: 4
+          OPENCLAW_EXTENSION_BOUNDARY_CONCURRENCY: 6
         shell: bash
         run: |
           set -euo pipefail