diff --git a/Gemfile.lock b/Gemfile.lock
index 5d6bda9..4acca5e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -323,7 +323,7 @@ GEM
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.4.1)
-    unicorn (5.4.1)
+    unicorn (5.5.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     websocket-driver (0.6.5)