diff --git a/HTTP_Exploration/app/Gemfile.lock b/HTTP_Exploration/app/Gemfile.lock
index 1c823fd..a80d1fa 100644
--- a/HTTP_Exploration/app/Gemfile.lock
+++ b/HTTP_Exploration/app/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
     minitest (5.11.3)
     nokogiri (1.10.3)
       mini_portile2 (~> 2.4.0)
-    rack (1.6.11)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.11.1)