diff --git a/Gemfile.lock b/Gemfile.lock
index 2410bb8..55f9d7a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.14.0)
     public_suffix (3.0.3)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)