diff --git a/Gemfile.lock b/Gemfile.lock
index d272d68..f91fd90 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -148,7 +148,7 @@ GEM
     pry-doc (0.4.2)
       pry (>= 0.9.0)
       yard (~> 0.8.1)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)