diff --git a/Gemfile b/Gemfile
index 505886d..b016d86 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,4 +28,4 @@ group :development do
   gem "yui-compressor"
 end
 
-gem "base64" if RUBY_VERSION >= "3.4"
+gem "base64" if RUBY_VERSION >= "3.3"