diff --git a/soc/st/stm32/stm32n6x/soc.c b/soc/st/stm32/stm32n6x/soc.c
index c967404862c..fa06138ce67 100644
--- a/soc/st/stm32/stm32n6x/soc.c
+++ b/soc/st/stm32/stm32n6x/soc.c
@@ -59,4 +59,8 @@ void soc_early_init_hook(void)
 	LL_PWR_EnableVddIO3();
 	LL_PWR_EnableVddIO4();
 	LL_PWR_EnableVddIO5();
+
+	/* Set Vdd IO2 and IO3 to 1.8V */
+	LL_PWR_SetVddIO2VoltageRange(LL_PWR_VDDIO_VOLTAGE_RANGE_1V8);
+	LL_PWR_SetVddIO3VoltageRange(LL_PWR_VDDIO_VOLTAGE_RANGE_1V8);
 }