diff --git a/Gemfile b/Gemfile
index 3f669ebe1..f1330f01c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem "responders", "2.4.1"
 
 # Appserver
 
-gem "unicorn", "5.5.0", require: false
+gem "unicorn", "5.5.1", require: false
 gem "unicorn-worker-killer", "0.4.4"
 
 # Federation
diff --git a/Gemfile.lock b/Gemfile.lock
index f9866a895..1929865ed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -739,7 +739,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.5)
     unicode-display_width (1.5.0)
-    unicorn (5.5.0)
+    unicorn (5.5.1)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     unicorn-worker-killer (0.4.4)
@@ -914,7 +914,7 @@ DEPENDENCIES
   twitter-text (= 1.14.7)
   typhoeus (= 1.3.1)
   uglifier (= 4.1.20)
-  unicorn (= 5.5.0)
+  unicorn (= 5.5.1)
   unicorn-worker-killer (= 0.4.4)
   uuid (= 2.3.9)
   versionist (= 1.7.0)