diff --git a/Gemfile.lock b/Gemfile.lock
index 7f07d84..40c1036 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -181,7 +181,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (3.0.3)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.6.2)