diff --git a/active_model_serializers.gemspec b/active_model_serializers.gemspec
index a57b8d9a..56f6972d 100644
--- a/active_model_serializers.gemspec
+++ b/active_model_serializers.gemspec
@@ -55,7 +55,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'will_paginate', '~> 3.0', '>= 3.0.7'
 
   spec.add_development_dependency 'bundler', '~> 1.6'
-  spec.add_development_dependency 'simplecov', '~> 0.11'
+  spec.add_development_dependency 'simplecov', '~> 0.17.1'
   spec.add_development_dependency 'timecop', '~> 0.7'
   spec.add_development_dependency 'grape', ['>= 0.13', '< 0.19.1']
   spec.add_development_dependency 'json_schema'