diff --git a/Gemfile.lock b/Gemfile.lock
index 84c427fb72..e05a795406 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -672,7 +672,7 @@ GEM
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.6.1)
-    unicorn (5.5.3)
+    unicorn (5.5.4)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     unicorn-rails (2.2.1)