diff --git a/filler/Gemfile.lock b/filler/Gemfile.lock
index f04bd11..6f08d8e 100644
--- a/filler/Gemfile.lock
+++ b/filler/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     httpclient (2.7.1)
-    json (1.8.3)
+    json (2.3.0)
     rack (1.6.4)
     rack-protection (1.5.3)
       rack