diff --git a/Gemfile.lock b/Gemfile.lock
index 0e3e985..31eee68 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -186,7 +186,7 @@ GEM
     public_suffix (4.0.7)
     puma (4.3.12)
       nio4r (~> 2.0)
-    rack (2.1.4)
+    rack (2.1.4.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.6.2)