diff --git a/Gemfile.lock b/Gemfile.lock
index d1ba6ec..6fac1c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     pry-remote (0.1.8)
       pry (~> 0.9)
       slop (~> 3.0)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.4)