diff --git a/Gemfile.lock b/Gemfile.lock
index 14a1efc..f2ad06f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -140,7 +140,7 @@ GEM
     launchy (2.4.2)
       addressable (~> 2.3)
     libv8 (3.16.14.3)
-    listen (2.3.1)
+    listen (2.4.0)
       celluloid (>= 0.15.2)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)