diff --git a/Gemfile.lock b/Gemfile.lock
index 285aad6..7049f7c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
     powerpack (0.1.1)
     proxifier (1.0.3)
     public_suffix (3.0.1)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-protection (2.0.0)
       rack
     rack-test (0.8.2)