diff --git a/ruby-gem/action.yml b/ruby-gem/action.yml
index 3b0b2ea..aaf739b 100644
--- a/ruby-gem/action.yml
+++ b/ruby-gem/action.yml
@@ -38,3 +38,7 @@ runs:
       working-directory: '${{ inputs.workdir }}'
       shell: 'bash'
       run: 'bundle exec rake'
+    - uses: ralexander-phi/license_approval@master
+      with:
+        working_directory: '${{ inputs.workdir }}'
+        extra_flags: --enabled-package-managers=bundler