diff --git a/ror_app/Gemfile.lock b/ror_app/Gemfile.lock
index 1580a4f..286fe59 100644
--- a/ror_app/Gemfile.lock
+++ b/ror_app/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
     mime-types (1.25)
     minitest (5.4.2)
     multi_json (1.10.1)
-    rack (1.5.2)
+    rack (1.5.5)
     rack-test (0.6.2)
       rack (>= 1.0)
     railroady (1.4.1)