diff --git a/lib/puma/cluster/worker.rb b/lib/puma/cluster/worker.rb
index 435890f7..6309b6aa 100644
--- a/lib/puma/cluster/worker.rb
+++ b/lib/puma/cluster/worker.rb
@@ -128,7 +128,7 @@ def run
 
             while true
               begin
-                payload = base_payload
+                payload = base_payload.dup
 
                 hsh = server.stats
                 hsh.each do |k, v|