diff --git a/Gemfile.lock b/Gemfile.lock
index e5fb621..d7c4e86 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -264,9 +264,9 @@ GEM
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
     shellany (0.0.1)
-    simplecov (0.11.2)
+    simplecov (0.12.0)
       docile (~> 1.1.0)
-      json (~> 1.8)
+      json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
     sinatra (1.4.7)