diff --git a/Gemfile.lock b/Gemfile.lock
index eb93cf9..9bcbbdc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -122,7 +122,7 @@ GEM
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     public_suffix (3.1.0)
-    puma (3.12.2)
+    puma (3.12.3)
     rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)