diff --git a/Gemfile.lock b/Gemfile.lock
index b459448..0059ebf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
   specs:
     diff-lcs (1.3)
     docile (1.3.2)
-    json (2.2.0)
+    json (2.3.1)
     money (2.1.3)
     rake (12.3.2)
     rspec (3.8.0)