diff --git a/Gemfile.lock b/Gemfile.lock
index 3fdc914..67b27c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     pg (1.2.3)
-    puma (4.3.9)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)