diff --git a/Gemfile.lock b/Gemfile.lock
index e25bed0..30e5690 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -149,7 +149,7 @@ GEM
     puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.6.0)
-    rack (2.2.4)
+    rack (2.2.20)
     rack-test (2.0.2)
       rack (>= 1.3)
     rails (5.2.8.1)