diff --git a/ruby-gem/action.yml b/ruby-gem/action.yml
index aaf739b..73a1e87 100644
--- a/ruby-gem/action.yml
+++ b/ruby-gem/action.yml
@@ -39,6 +39,8 @@ runs:
       shell: 'bash'
       run: 'bundle exec rake'
     - uses: ralexander-phi/license_approval@master
+      env:
+        BUNDLE_GEMFILE: '${{ inputs.gemfile }}'
       with:
         working_directory: '${{ inputs.workdir }}'
         extra_flags: --enabled-package-managers=bundler