diff --git a/Gemfile b/Gemfile
index 82ee2a3..7c12d9b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 # Shared Gems
 gem 'rails', '4.1.7'
-gem 'puma', '2.8.2'
+gem 'puma', '4.3.11'
 gem 'faraday', '0.8.9'
 gem 'activeresource', '4.0.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index ee83b68..497797f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,14 +99,15 @@ GEM
     minitest (5.5.1)
     multi_json (1.10.1)
     multipart-post (1.2.0)
+    nio4r (2.5.8)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
     octokit (3.2.0)
       sawyer (~> 0.5.3)
     phantomjs (1.9.7.1)
-    puma (2.8.2)
-      rack (>= 1.1, < 2.0)
-    rack (1.5.2)
+    puma (4.3.11)
+      nio4r (~> 2.0)
+    rack (1.5.5)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)
@@ -215,7 +216,7 @@ DEPENDENCIES
   kramdown (= 1.4.0)
   octokit (= 3.2.0)
   phantomjs (= 1.9.7.1)
-  puma (= 2.8.2)
+  puma (= 4.3.11)
   rails (= 4.1.7)
   rspec-rails (= 3.1.0)
   sass (= 3.3.9)