diff --git a/Gemfile.lock b/Gemfile.lock
index 308a7fa..c20d369 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       ast (>= 1.1, < 3.0)
     pg (0.18.3)
     powerpack (0.1.1)
-    puma (2.14.0)
+    puma (2.15.3)
     rack (1.6.4)
     rack-pjax (0.8.0)
       nokogiri (~> 1.5)