diff --git a/lib/logger/logger.gemspec b/lib/logger/logger.gemspec
index ccd4e70db7..d12db625d9 100644
--- a/lib/logger/logger.gemspec
+++ b/lib/logger/logger.gemspec
@@ -23,5 +23,4 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", ">= 0"
   spec.add_development_dependency "rake", ">= 12.3.3"
   spec.add_development_dependency "test-unit"
-  spec.add_development_dependency "rdoc"
 end