diff --git a/Gemfile.lock b/Gemfile.lock
index ede0050c4..03dc31040 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -488,7 +488,7 @@ GEM
       execjs (>= 0.3.0)
       json (>= 1.8.0)
     unicode-display_width (1.1.3)
-    unicorn (5.2.0)
+    unicorn (5.3.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     uniform_notifier (1.10.0)