diff --git a/Gemfile.lock b/Gemfile.lock
index 6371173..77581cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -240,7 +240,7 @@ GEM
       net-smtp
       premailer (~> 1.7, >= 1.7.9)
     public_suffix (5.0.3)
-    puma (6.3.1)
+    puma (6.4.0)
       nio4r (~> 2.0)
     racc (1.7.1)
     rack (2.2.8)