diff --git a/Gemfile.lock b/Gemfile.lock
index c2438322..1cc64322 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -201,7 +201,7 @@ GEM
     psych (5.1.2)
       stringio
     public_suffix (6.0.1)
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     puma_worker_killer (1.0.0)
       bigdecimal (>= 2.0)