diff --git a/Gemfile.lock b/Gemfile.lock
index 4b5315f..a4e7f10 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -56,7 +56,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.0.8)
+    rack (2.1.4)
     rack-protection (2.0.5)
       rack
     rack-test (1.1.0)