diff --git a/Gemfile.lock b/Gemfile.lock
index 53a292e..19c1050 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
     ethon (0.11.0)
       ffi (>= 1.3.0)
     ffi (1.9.25)
-    json (2.1.0)
+    json (2.3.0)
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)