diff --git a/Gemfile.lock b/Gemfile.lock
index 515f04db..dc5cdb96 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
     nokogiri (1.8.3)
       mini_portile2 (~> 2.3.0)
     puma (3.12.6)
-    rack (2.0.5)
+    rack (2.2.6.4)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
     rails (5.1.6)