diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 70a8416..88097c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,10 +51,11 @@ jobs:
         run: |
           gem install bundler
           bundle config set --local with 'development'
+          bundle config set --local without 'production'
           bundle install --jobs 4 --retry 3
 
       - name: Run rubocop
-        run: bundle exec rubocop
+        run: bundle exec rubocop ./lib
 
   build:
     runs-on: ubuntu-latest