diff --git a/Gemfile.lock b/Gemfile.lock
index 5a11c55..bd5fd70 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
       ast (~> 2.2)
     pg (0.18.4)
     powerpack (0.1.1)
-    puma (3.3.0)
+    puma (3.4.0)
     rack (1.6.4)
     rack-pjax (0.8.0)
       nokogiri (~> 1.5)