diff --git a/yard.gemspec b/yard.gemspec
index 312a6cbdf..705bd5274 100644
--- a/yard.gemspec
+++ b/yard.gemspec
@@ -21,4 +21,5 @@ Gem::Specification.new do |s|
   s.executables   = ['yard', 'yardoc', 'yri']
   s.license = 'MIT' if s.respond_to?(:license=)
   s.metadata['yard.run'] = 'yri'
+  s.add_dependency 'logger'
 end