diff --git a/weather-server-ruby/Gemfile b/weather-server-ruby/Gemfile
index 7764e09..7e03424 100644
--- a/weather-server-ruby/Gemfile
+++ b/weather-server-ruby/Gemfile
@@ -2,4 +2,4 @@
 
 source "https://rubygems.org"
 
-gem "mcp", ">= 1.1.0"
+gem "mcp", ">= 1.2.0"