diff --git a/Gemfile.lock b/Gemfile.lock
index e6e71ae..0c6f4f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -113,7 +113,7 @@ GEM
     public_suffix (4.0.6)
     puma (4.3.11)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.0)