diff --git a/Gemfile.lock b/Gemfile.lock
index e8eb838..ce2143a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -191,7 +191,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    puma (4.3.11)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)