diff --git a/esphome/components/captive_portal/dns_server_esp32_idf.h b/esphome/components/captive_portal/dns_server_esp32_idf.h
index 1d8ca260a7..05efd359f4 100644
--- a/esphome/components/captive_portal/dns_server_esp32_idf.h
+++ b/esphome/components/captive_portal/dns_server_esp32_idf.h
@@ -15,7 +15,7 @@ class DNSServer {
   void process_next_request();
 
  protected:
-  static constexpr size_t DNS_BUFFER_SIZE = 128;
+  static constexpr size_t DNS_BUFFER_SIZE = 192;
 
   void process_dns_request();