diff --git a/monkey/infection_monkey/monkey.py b/monkey/infection_monkey/monkey.py
index cccc7af9b..f04b1b72a 100644
--- a/monkey/infection_monkey/monkey.py
+++ b/monkey/infection_monkey/monkey.py
@@ -260,7 +260,7 @@ class InfectionMonkey:
 
     def _build_server_list(self, relay_port: int):
         my_servers = set(map(str, self._opts.servers))
-        relay_servers = set([f"{ip}:{relay_port}" for ip in get_my_ip_addresses()])
+        relay_servers = {f"{ip}:{relay_port}" for ip in get_my_ip_addresses()}
         return my_servers.union(relay_servers)
 
     def _build_master(self, relay_port: int):