diff --git a/Gemfile.lock b/Gemfile.lock
index fdb18e1..00d8d7e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,7 +21,7 @@ GEM
       ruby2_keywords
     faraday-net_http (1.0.1)
     hashdiff (1.0.0)
-    json (2.2.0)
+    json (2.5.1)
     method_source (0.9.2)
     minitest (5.11.3)
     multipart-post (2.1.1)