diff --git a/Gemfile.lock b/Gemfile.lock
index 598a8e316d..9338a39541 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -747,7 +747,7 @@ GEM
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.3.2)
-    unicorn (5.4.1)
+    unicorn (5.5.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     unicorn-rails (2.2.1)