diff --git a/Gemfile b/Gemfile
index 70621fc..9f8acf6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@
 ruby '~> 3.2'
 
 source 'https://rubygems.org'
-gem 'rbs', '~> 3.3.0', require: false
+gem 'rbs', '~> 3.5.3', require: false
 
 # 09/main-matrix
 gem 'matrix', '~> 0.4'