diff --git a/Gemfile.lock b/Gemfile.lock
index b474b01..b4636cd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,7 +99,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    puma (2.8.2)
+    puma (2.9.0)
       rack (>= 1.1, < 2.0)
     rack (1.5.2)
     rack-pjax (0.7.0)