diff --git a/Gemfile.lock b/Gemfile.lock
index d5a3497..06448db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,7 +69,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     nokogiri (1.10.5-x86-mingw32)
       mini_portile2 (~> 2.4.0)
-    puma (3.12.1)
+    puma (3.12.3)
     rack (2.1.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)