diff --git a/boards/arm/stm32f7/stm32f746g-disco/configs/lvgl/defconfig b/boards/arm/stm32f7/stm32f746g-disco/configs/lvgl/defconfig
index b5be48bd47e..b334a6a03a8 100644
--- a/boards/arm/stm32f7/stm32f746g-disco/configs/lvgl/defconfig
+++ b/boards/arm/stm32f7/stm32f746g-disco/configs/lvgl/defconfig
@@ -37,6 +37,8 @@ CONFIG_FT5X06_SINGLEPOINT=y
 CONFIG_GRAPHICS_LVGL=y
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_HEAP2_BASE=0xC003FC00
+CONFIG_HEAP2_SIZE=8127488
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_INPUT=y
 CONFIG_INPUT_FT5X06=y
@@ -49,7 +51,7 @@ CONFIG_LV_USE_DEMO_WIDGETS=y
 CONFIG_LV_USE_LOG=y
 CONFIG_LV_USE_NUTTX=y
 CONFIG_LV_USE_NUTTX_TOUCHSCREEN=y
-CONFIG_MM_REGIONS=3
+CONFIG_MM_REGIONS=4
 CONFIG_MQ_MAXMSGSIZE=256
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
@@ -61,6 +63,7 @@ CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_HPWORK=y
 CONFIG_SCHED_WAITPID=y
 CONFIG_STM32F746GDISCO_TOUCHSCREEN_SWAPXY=y
+CONFIG_STM32F7_EXTERNAL_RAM=y
 CONFIG_STM32F7_FMC=y
 CONFIG_STM32F7_I2C3=y
 CONFIG_STM32F7_LTDC=y