diff --git a/Gemfile.lock b/Gemfile.lock
index ece6bbf..41f4d9a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -194,7 +194,7 @@ GEM
     premailer-rails (1.9.2)
       actionmailer (>= 3, < 6)
       premailer (~> 1.7, >= 1.7.9)
-    puma (3.4.0)
+    puma (3.12.4)
     rabl (0.11.8)
       activesupport (>= 2.3.14)
     rack (1.6.4)