diff --git a/Gemfile.lock b/Gemfile.lock
index 97bd874..ca8a98c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     diff-lcs (1.2.5)
     docile (1.1.5)
-    json (2.0.2)
+    json (2.3.1)
     kramdown (1.17.0)
     mdl (0.5.0)
       kramdown (~> 1.12, >= 1.12.0)