diff --git a/Gemfile.lock b/Gemfile.lock
index 019ab5f..71a67dc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
       rack (>= 1.6.2, < 3)
     orm_adapter (0.5.0)
     public_suffix (4.0.1)
-    puma (3.12.1)
+    puma (3.12.4)
     rack (2.0.8)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)