diff --git a/Gemfile.lock b/Gemfile.lock
index ed357a6..a806b62 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
     jquery-rails (2.0.2)
       railties (>= 3.2.0, < 5.0)
       thor (~> 0.14)
-    json (1.7.4)
+    json (1.8.6)
     kgio (2.7.4)
     libv8 (3.3.10.4)
     mail (2.4.4)