diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 495bd13f..c662bc99 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -55,7 +55,7 @@ jobs:
         run: |
           gem install ffi
           bundle install
-          gem uninstall --force eventmachine && gem install eventmachine --platform ruby
+          gem uninstall --force eventmachine && gem install eventmachine --platform ruby -- --with-ldflags="-Wl,-undefined,dynamic_lookup"
       - name: Run tests
         run: |
           bundle exec rake test:unit