diff --git a/Gemfile.lock b/Gemfile.lock
index 7ebf4fd..9492d3e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -165,7 +165,7 @@ GEM
     psych (5.1.2)
       stringio
     public_suffix (6.0.0)
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (2.2.10)