diff --git a/Gemfile.lock b/Gemfile.lock
index 203b795..5eae8d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     docile (1.3.1)
     hirb (0.7.3)
     jaro_winkler (1.5.1)
-    json (2.1.0)
+    json (2.5.1)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     mustermann (1.0.2)