diff --git a/spec/dummy/sandbox/Gemfile.lock b/spec/dummy/sandbox/Gemfile.lock
index f3127e7..febb843 100644
--- a/spec/dummy/sandbox/Gemfile.lock
+++ b/spec/dummy/sandbox/Gemfile.lock
@@ -2,8 +2,8 @@ GEM
   remote: https://rubygems.org/
   specs:
     i18n (0.6.5)
-    json (1.8.0)
-    json (1.8.0-java)
+    json (2.3.0)
+    json (2.3.0-java)
     multi_json (1.8.1)
 
 PLATFORMS