diff --git a/.github/workflows/rspec-truffle.yml b/.github/workflows/rspec-truffle.yml
index b08a832..3ec8d84 100644
--- a/.github/workflows/rspec-truffle.yml
+++ b/.github/workflows/rspec-truffle.yml
@@ -18,6 +18,7 @@ jobs:
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: truffleruby
+        bundler: latest
         bundler-cache: true
     - name: Run RSpec
       run: |