diff --git a/Gemfile.lock b/Gemfile.lock
index 7cdfe7a..0773898 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)
     libwebsocket (0.1.5)
       addressable
     mail (2.4.4)