diff --git a/Gemfile.lock b/Gemfile.lock
index f2efe5c..3b9e34a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
     psych (5.1.2)
       stringio
     public_suffix (5.1.1)
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.1.7)