diff --git a/Gemfile b/Gemfile
index d610f97..f5031a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -26,5 +26,5 @@ group :development, :test do
   gem 'minitest'
   gem 'mocha'
   gem 'ostruct'
-  gem 'simplecov', '0.22.0', require: false # CC last supported v0.17
+  gem 'simplecov', '1.2.0', require: false # CC last supported v0.17
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index da55d25..e4f12b0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,6 @@ GEM
     concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     daemons (1.4.1)
-    docile (1.4.1)
     dotenv (3.2.0)
     drb (2.2.3)
     eventmachine (1.2.7)
@@ -80,12 +79,7 @@ GEM
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     securerandom (0.4.1)
-    simplecov (0.22.0)
-      docile (~> 1.1)
-      simplecov-html (~> 0.11)
-      simplecov_json_formatter (~> 0.1)
-    simplecov-html (0.13.2)
-    simplecov_json_formatter (0.1.4)
+    simplecov (1.2.0)
     simpleidn (0.3.0)
     timeout (0.4.3)
     tzinfo (2.0.6)
@@ -111,7 +105,7 @@ DEPENDENCIES
   pg (~> 1.6.3)
   pry (~> 0.16.0)
   rubocop
-  simplecov (= 0.22.0)
+  simplecov (= 1.2.0)
   simpleidn (~> 0.3.0)
 
 RUBY VERSION