diff --git a/.github/workflows/pre_release.yml b/.github/workflows/pre_release.yml
index d984775c1..79c43ec01 100644
--- a/.github/workflows/pre_release.yml
+++ b/.github/workflows/pre_release.yml
@@ -42,7 +42,9 @@ jobs:
 
       - name: Build WebUI
         run: |
-          cd interface
+          cd mock-api
+          yarn install
+          cd ../interface
           yarn install
           yarn typesafe-i18n --no-watch
           sed -i "s/= 'pl'/= 'en'/" ./src/i18n/i18n-util.ts