diff --git a/Gemfile.lock b/Gemfile.lock
index 744e05f..3aa1382 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,7 +164,7 @@ GEM
       pry (>= 0.13.0)
     psych (5.1.2)
       stringio
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.1.7)