diff --git a/tools/flash_device.py b/tools/flash_device.py
index a32a268..7b1018d 100755
--- a/tools/flash_device.py
+++ b/tools/flash_device.py
@@ -2,7 +2,7 @@
 """
 flash_device.py — Write NVS config to TimerCamera-F over serial.
 
-Requires: pip install esptool nvs-partition-gen
+Requires: pip install esptool esp-idf-nvs-partition-gen
 Usage:
   python flash_device.py \\
     --port /dev/ttyUSB0 \\
@@ -84,7 +84,7 @@ def main():
 
         # Generate NVS binary
         ret = subprocess.run(
-            [sys.executable, "-m", "nvs_partition_gen", "generate",
+            [sys.executable, "-m", "esp_idf_nvs_partition_gen", "generate",
              csv_path, bin_path, NVS_PARTITION_SIZE],
             capture_output=True, text=True
         )