diff --git a/Gemfile b/Gemfile
index 425cbf7e0..f69bacff6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem "responders", "2.3.0"
 
 # Appserver
 
-gem "unicorn", "5.2.0", require: false
+gem "unicorn", "5.3.0", require: false
 gem "unicorn-worker-killer", "0.4.4"
 
 # Federation
diff --git a/Gemfile.lock b/Gemfile.lock
index aacb00e8c..2c2375d3f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -565,7 +565,7 @@ GEM
       thor (>= 0.18.1, < 2.0)
     rainbow (2.2.2)
       rake
-    raindrops (0.17.0)
+    raindrops (0.18.0)
     rake (12.0.0)
     rb-fsevent (0.9.8)
     rb-inotify (0.9.8)
@@ -715,7 +715,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.2)
     unicode-display_width (1.1.3)
-    unicorn (5.2.0)
+    unicorn (5.3.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     unicorn-worker-killer (0.4.4)
@@ -889,7 +889,7 @@ DEPENDENCIES
   twitter-text (= 1.14.5)
   typhoeus (= 1.1.2)
   uglifier (= 3.1.2)
-  unicorn (= 5.2.0)
+  unicorn (= 5.3.0)
   unicorn-worker-killer (= 0.4.4)
   uuid (= 2.3.8)
   versionist (= 1.5.0)