diff --git a/Gemfile.lock b/Gemfile.lock
index 7a825ff..94f64d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
       pg
     public_suffix (3.0.0)
     puma (3.10.0)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
     rails (5.1.4)