diff --git a/sample-apps/blank-ruby/function/Gemfile b/sample-apps/blank-ruby/function/Gemfile
index bc5290be..eacb7019 100644
--- a/sample-apps/blank-ruby/function/Gemfile
+++ b/sample-apps/blank-ruby/function/Gemfile
@@ -1,4 +1,6 @@
 # Gemfile
+ruby '3.2'
+
 source 'https://rubygems.org'
 
 gem 'aws-xray-sdk', '0.11.4'
diff --git a/sample-apps/layer-ruby/layer/Gemfile b/sample-apps/layer-ruby/layer/Gemfile
index 64ad6202..460db924 100644
--- a/sample-apps/layer-ruby/layer/Gemfile
+++ b/sample-apps/layer-ruby/layer/Gemfile
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+ruby '3.2'
 
 source "https://rubygems.org"