diff --git a/Readme.md b/Readme.md
index 35532f0..a8ac182 100644
--- a/Readme.md
+++ b/Readme.md
@@ -51,7 +51,7 @@ esphome version
 
 ## 4️⃣ Flash the SmartCube
 
-1. Connect your D1 Mini to your PC using a **data-capable micro-USB cable**.
+1. Connect your D1 Mini to your PC using a **data-capable USB cable**.
 
 2. Upload the firmware:
 
@@ -59,9 +59,18 @@ esphome version
 esphome run smartcube.yaml
 ```
 
+**3. ESPHome may ask which device to flash.**
+Look for the entry that says something like:
+
+```
+(USB Serial Port (COMX))
+```
+
+Select that one (usually your D1 Mini) by typing its number and pressing **Enter**.
+
 ESPHome will compile and flash the firmware.
 
-3. After flashing, the cube will connect to the Wi-Fi you set in the config.
+4. After flashing, the cube will connect to the Wi-Fi you set in the config.
 
    * If it fails, it will start a fallback AP named **SmartCube** with password **12345678**.
    * Connect to this AP to configure your Wi-Fi.