diff --git a/Gemfile.lock b/Gemfile.lock
index abeb0da..9e9b3b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,8 +12,8 @@ GEM
     docile (1.3.2)
     jaro_winkler (1.5.3)
     jaro_winkler (1.5.3-java)
-    json (2.2.0)
-    json (2.2.0-java)
+    json (2.3.1)
+    json (2.3.1-java)
     minitest (5.11.3)
     minitest-reporters (1.3.6)
       ansi