diff --git a/iOS/Gemfile.lock b/iOS/Gemfile.lock
index 7fbd930..caa8293 100644
--- a/iOS/Gemfile.lock
+++ b/iOS/Gemfile.lock
@@ -137,7 +137,7 @@ GEM
     httpclient (2.8.3)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    json (2.2.0)
+    json (2.3.1)
     jwt (2.1.0)
     memoist (0.16.1)
     mime-types (3.3)