diff --git a/internal/adapter/templates/templates/skeleton/docs/Gemfile b/internal/adapter/templates/templates/skeleton/docs/Gemfile
index 64b039e..a80f6f5 100644
--- a/internal/adapter/templates/templates/skeleton/docs/Gemfile
+++ b/internal/adapter/templates/templates/skeleton/docs/Gemfile
@@ -8,7 +8,8 @@ gem 'middleman-syntax', '~> 3.2'
 gem 'middleman-sprockets', '~> 4.1'
 
 # Slate-specific dependencies
-gem 'rouge', '~> 4.0'
+# Rouge 3.x required by middleman-syntax ~> 3.2
+gem 'rouge', '~> 3.26'
 gem 'redcarpet', '~> 3.5'
 gem 'nokogiri', '~> 1.15'
 gem 'activesupport', '~> 7.0'