diff --git a/esphome/components/captive_portal/__init__.py b/esphome/components/captive_portal/__init__.py
index c730624b49..5f7ae32570 100644
--- a/esphome/components/captive_portal/__init__.py
+++ b/esphome/components/captive_portal/__init__.py
@@ -74,12 +74,12 @@ def _final_validate(config: ConfigType) -> ConfigType:
 
     # Register socket needs for DNS server and additional HTTP connections
     # - 1 UDP socket for DNS server
-    # - 2 additional TCP sockets for captive portal detection probes + configuration requests
+    # - 3 additional TCP sockets for captive portal detection probes + configuration requests
     #   (OS captive portal detection makes multiple probe requests that stay in TIME_WAIT,
     #    need headroom for actual user configuration requests)
     from esphome.components import socket
 
-    socket.consume_sockets(3, "captive_portal")(config)
+    socket.consume_sockets(4, "captive_portal")(config)
 
     return config