diff --git a/Gemfile.lock b/Gemfile.lock
index b534f56..4d65f5f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -186,7 +186,7 @@ GEM
     pg (1.5.4)
     public_suffix (4.0.7)
     racc (1.7.3)
-    rack (2.2.8)
+    rack (2.2.9)
     rack-test (2.1.0)
       rack (>= 1.3)
     rails (5.2.8.1)