diff --git a/firmware/docs/prepare_diff.bat b/firmware/docs/prepare_diff.bat
index 65bc645917..098af26418 100644
--- a/firmware/docs/prepare_diff.bat
+++ b/firmware/docs/prepare_diff.bat
@@ -1,6 +1,8 @@
 
 git clone -b stable_16.1.x https://github.com/rusefi/ChibiOS Chibios.16_original
+git -C Chibios.16_original pull
 git clone -b stable_rusefi https://github.com/rusefi/ChibiOS Chibios.16_rusefi
+git -C Chibios.16_rusefi pull
 diff -uwr Chibios.16_rusefi Chibios.16_original > rusefi_chibios_16.patch
 diff -uwr Chibios.16_original Chibios.16_rusefi > chibios_rusefi_16.patch