diff --git a/Gemfile.lock b/Gemfile.lock
index 91a254a..619aa8f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,7 +106,7 @@ GEM
     pg (0.19.0)
     pkg-config (1.1.7)
     powerpack (0.1.1)
-    puma (3.4.0)
+    puma (3.6.0)
     rack (1.6.4)
     rack-pjax (0.8.0)
       nokogiri (~> 1.5)