diff --git a/Gemfile.lock b/Gemfile.lock
index 5cd6996..0fa3955 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -222,7 +222,7 @@ GEM
     psych (5.1.2)
       stringio
     public_suffix (6.0.1)
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)