diff --git a/Gemfile.lock b/Gemfile.lock
index f4f3d7c..3d119ed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -162,7 +162,7 @@ GEM
     parser (2.4.0.0)
       ast (~> 2.2)
     powerpack (0.1.1)
-    puma (3.12.0)
+    puma (3.12.4)
     rack (1.6.5)
     rack-protection (1.5.3)
       rack