diff --git a/.github/scripts/setup.sh b/.github/scripts/setup.sh
index 210374f64..11a631ecb 100755
--- a/.github/scripts/setup.sh
+++ b/.github/scripts/setup.sh
@@ -4,7 +4,7 @@ brew install swiftgen@6.6.2
 brew install sourcery@2.1.3
 
 # Install Ruby Bundler
-gem install bundler:2.3.11
+gem install bundler:2.5.21
 
 # Install Ruby Gems
 bundle install