diff --git a/Gemfile b/Gemfile
index ce01b41..22cf9ee 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,4 +9,4 @@ gem "rubocop", "1.3.1"
 gem "rubocop-minitest", "0.10.1"
 gem "rubocop-packaging", "0.5.1"
 gem "rubocop-performance", "1.9.0"
-gem "simplecov", "~> 0.19.1"
+gem "simplecov", "~> 0.17.1"