diff --git a/Gemfile b/Gemfile
index ab01236f..f11e3b31 100644
--- a/Gemfile
+++ b/Gemfile
@@ -51,7 +51,7 @@ group :test do
   gem 'json-schema', '2.8.0'
   gem "rspec-rails", "~> 3.7.2"
   gem "shoulda-matchers", "3.1.2"
-  gem "simplecov", "0.15.1"
+  gem "simplecov", "0.16.1"
   gem "simplecov-rcov", "0.2.3"
   gem 'webmock', '3.3.0'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index cd7efa77..d18f4842 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     diff-lcs (1.3)
-    docile (1.1.5)
+    docile (1.3.0)
     domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
     equalizer (0.0.11)
@@ -330,8 +330,8 @@ GEM
     simple_form (3.5.1)
       actionpack (> 4, < 5.2)
       activemodel (> 4, < 5.2)
-    simplecov (0.15.1)
-      docile (~> 1.1.0)
+    simplecov (0.16.1)
+      docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
@@ -422,7 +422,7 @@ DEPENDENCIES
   select2-rails (~> 4.0.0)
   shoulda-matchers (= 3.1.2)
   simple_form (~> 3.5.1)
-  simplecov (= 0.15.1)
+  simplecov (= 0.16.1)
   simplecov-rcov (= 0.2.3)
   therubyracer (= 0.12.3)
   thin