diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index de98947a7..d2d427851 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
       if: matrix.os == 'macos'
 
     # Bundler 2 seems to fix installing rubygems-tasks on Ruby < 2.4
-    - run: gem install bundler
+    - run: gem install bundler --no-document
     - run: bundle install
     - run: bundle exec rake libffi
     - run: bundle exec rake compile