diff --git a/Gemfile.lock b/Gemfile.lock
index e54ab51..0664e00 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,7 +164,7 @@ GEM
     uglifier (2.1.2)
       execjs (>= 0.3.0)
       multi_json (~> 1.0, >= 1.0.2)
-    unicorn (4.6.3)
+    unicorn (5.5.1)
       kgio (~> 2.6)
       rack
       raindrops (~> 0.7)