diff --git a/Gemfile.lock b/Gemfile.lock
index 8d58a51..0c6aad5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,7 +24,7 @@ GEM
       ffi (>= 1.3.0)
     ffi (1.9.25)
     hashdiff (0.3.7)
-    json (2.1.0)
+    json (2.3.0)
     public_suffix (3.0.3)
     rake (12.0.0)
     rspec (3.8.0)