diff --git a/Gemfile b/Gemfile
index e32b28888..29f33323f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -79,7 +79,7 @@ else
 end
 
 group :development do
-  gem "rdoc", "~> 4.3"
+  gem "rdoc"
   gem "yard"
 end