diff --git a/Gemfile.lock b/Gemfile.lock
index 9beb637..3cf7d54 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -188,7 +188,7 @@ GEM
       nio4r (~> 2.0)
     raabro (1.3.1)
     racc (1.6.0)
-    rack (2.2.4)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.1)