diff --git core/plugin/gtk/Gemfile core/plugin/gtk/Gemfile
index 16f4cd7..f94b268 100644
--- core/plugin/gtk/Gemfile
+++ core/plugin/gtk/Gemfile
@@ -1,3 +1,3 @@
 source 'https://rubygems.org'
 
-gem 'gtk2', '2.1.0'
+gem 'gtk2', '2.2.0'