diff --git a/Gemfile.lock b/Gemfile.lock
index 3fb5e8f..837bb13 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
       thor (= 0.18.1)
     diff-lcs (1.3)
     docile (1.1.5)
-    json (2.1.0)
+    json (2.3.1)
     method_source (0.9.0)
     mime-types (3.1)
       mime-types-data (~> 3.2015)