diff --git a/esphome/__main__.py b/esphome/__main__.py
index 97059154fd..c2a6dd343f 100644
--- a/esphome/__main__.py
+++ b/esphome/__main__.py
@@ -226,6 +226,8 @@ def upload_using_esptool(config, port):
             mcu,
             "write_flash",
             "-z",
+            "--flash_size",
+            "detect",
         ]
         for img in flash_images:
             cmd += [img.offset, img.path]