diff --git a/gem/Gemfile.lock b/gem/Gemfile.lock
index d7c78220..f70289cd 100644
--- a/gem/Gemfile.lock
+++ b/gem/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
       prism
       zeitwerk
     regexp_parser (2.12.0)
-    rouge (5.0.0)
+    rouge (5.1.0)
       strscan (~> 3.1)
     rubocop (1.88.2)
       json (~> 2.3)
@@ -79,7 +79,7 @@ DEPENDENCIES
   minitest (~> 6.0)
   phlex (~> 2.1, >= 2.1.2)
   rake (~> 13.0)
-  rouge (~> 5.0.0)
+  rouge (~> 5.1.0)
   ruby_ui!
   standard (~> 1.0)
   tailwind_merge (~> 1.4)
diff --git a/gem/ruby_ui.gemspec b/gem/ruby_ui.gemspec
index 9a868f2d..6df8c795 100644
--- a/gem/ruby_ui.gemspec
+++ b/gem/ruby_ui.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.required_ruby_version = ">= 3.2"
 
   s.add_development_dependency "phlex", "~> 2.1", ">= 2.1.2"
-  s.add_development_dependency "rouge", "~> 5.0.0"
+  s.add_development_dependency "rouge", "~> 5.1.0"
   s.add_development_dependency "tailwind_merge", "~> 1.4"
   s.add_development_dependency "rake", "~> 13.0"
   s.add_development_dependency "standard", "~> 1.0"