diff --git a/Gemfile.lock b/Gemfile.lock
index 18fb2cc..f71e765 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (3.8.2)
-    rack (2.0.1)
+    rack (2.2.6.2)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.2)