diff --git a/.github/workflows/pr-gated.yml b/.github/workflows/pr-gated.yml
index 44d34da..8e3ea46 100644
--- a/.github/workflows/pr-gated.yml
+++ b/.github/workflows/pr-gated.yml
@@ -31,6 +31,9 @@ jobs:
         run: yarn lint
       - name: build
         run: yarn build
+      - name: yarn install:ui
+        run: yarn --frozen-lockfine
+        working-directory: ./ui
       - name: build:ui
         run: yarn build
         working-directory: ./ui
\ No newline at end of file