diff --git a/Gemfile.lock b/Gemfile.lock
index 0b66cf6..8683e0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.0.8)
+    rack (2.1.4)
     rack-protection (2.0.4)
       rack
     rack-test (0.6.3)