diff --git a/boards/weact_stm32g431_core.overlay b/boards/weact_stm32g431_core.overlay
index b98182b..0bad0e8 100644
--- a/boards/weact_stm32g431_core.overlay
+++ b/boards/weact_stm32g431_core.overlay
@@ -23,5 +23,7 @@
 };
 
 &adc1 {
+	st,adc-clock-source = "SYNC";
+	st,adc-prescaler = <4>;
 	status = "okay";
 };