diff --git a/Gemfile.lock b/Gemfile.lock
index b5bd95a..d7f0725 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
     nio4r (2.5.8)
     openssl (2.1.2)
       ipaddr
-    puma (4.3.11)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-contrib (2.1.0)