diff --git a/Gemfile.lock b/Gemfile.lock
index 9689e73..4958fa4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ GEM
       safe_yaml (~> 1.0.0)
     crass (1.0.4)
     diff-lcs (1.3)
-    docile (1.3.1)
+    docile (1.4.0)
     dotenv (2.7.2)
     dotenv-rails (2.7.2)
       dotenv (= 2.7.2)
@@ -89,7 +89,6 @@ GEM
     jaro_winkler (1.5.2)
     jbuilder (2.9.1)
       activesupport (>= 4.2.0)
-    json (2.1.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -102,7 +101,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.9.3)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
@@ -184,11 +185,12 @@ GEM
     safe_yaml (1.0.5)
     shoulda-matchers (4.1.0)
       activesupport (>= 4.2.0)
-    simplecov (0.16.1)
+    simplecov (0.21.2)
       docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.3)
     spring (2.0.2)
       activesupport (>= 4.2)
     spring-watcher-listen (2.0.1)