diff --git a/Gemfile.lock b/Gemfile.lock
index 3687e313..44a25dd6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -255,7 +255,7 @@ 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)