diff --git a/Gemfile.lock b/Gemfile.lock
index 50e56bf..ea161c7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
     pg (0.21.0)
     pg (0.21.0-x86-mingw32)
     puma (3.9.1)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.4)