diff --git a/Gemfile.lock b/Gemfile.lock
index e16862d..ea2eabc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -195,7 +195,7 @@ GEM
     public_suffix (5.0.0)
     puma (3.12.6)
     racc (1.6.1)
-    rack (2.2.6.3)
+    rack (2.2.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)