diff --git a/Gemfile.lock b/Gemfile.lock
index 276651e..25bfe16 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.0.0)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-flash3 (1.0.5)
       rack
     rack-protection (2.0.0)