diff --git a/ini/stm32h7.ini b/ini/stm32h7.ini
index 58a56419e5..9b43200ff0 100644
--- a/ini/stm32h7.ini
+++ b/ini/stm32h7.ini
@@ -24,8 +24,7 @@
 #
 [env:BTT_SKR_SE_BX]
 extends            = stm32_variant
-# framework-arduinoststm32 uses biqu-bx-workaround branch
-platform_packages  = framework-arduinoststm32@https://github.com/thisiskeithb/Arduino_Core_STM32/archive/8b3522051a.zip
+platform_packages  = framework-arduinoststm32@https://github.com/thisiskeithb/Arduino_Core_STM32/archive/biqu-bx-workaround.zip
 board              = marlin_BTT_SKR_SE_BX
 board_build.offset = 0x20000
 build_flags        = ${stm32_variant.build_flags} ${stm_flash_drive.build_flags}
@@ -45,18 +44,18 @@ debug_tool         = cmsis-dap
 #
 [env:STM32H743Vx_btt]
 extends                     = stm32_variant
-platform                    = ststm32@~14.1.0
-platform_packages           = framework-arduinoststm32@~4.20600.231001
+platform                    = ststm32@~15.4.1
+platform_packages           = framework-arduinoststm32@~4.20200.220530
 board                       = marlin_STM32H743Vx
 board_build.offset          = 0x20000
 board_upload.offset_address = 0x08020000
 build_flags                 = ${stm32_variant.build_flags}
-                              -DPIN_SERIAL1_RX=PA_10 -DPIN_SERIAL1_TX=PA_9
-                              -DPIN_SERIAL3_RX=PD_9 -DPIN_SERIAL3_TX=PD_8
-                              -DPIN_SERIAL4_RX=PA_1 -DPIN_SERIAL4_TX=PA_0
-                              -DSERIAL_RX_BUFFER_SIZE=1024 -DSERIAL_TX_BUFFER_SIZE=1024
-                              -DTIMER_SERVO=TIM5 -DTIMER_TONE=TIM2
-                              -DSTEP_TIMER_IRQ_PRIO=0
-                              -DD_CACHE_DISABLED
+                            -DPIN_SERIAL1_RX=PA_10 -DPIN_SERIAL1_TX=PA_9
+                            -DPIN_SERIAL3_RX=PD_9 -DPIN_SERIAL3_TX=PD_8
+                            -DPIN_SERIAL4_RX=PA_1 -DPIN_SERIAL4_TX=PA_0
+                            -DSERIAL_RX_BUFFER_SIZE=1024 -DSERIAL_TX_BUFFER_SIZE=1024
+                            -DTIMER_SERVO=TIM5 -DTIMER_TONE=TIM2
+                            -DSTEP_TIMER_IRQ_PRIO=0
+                            -DD_CACHE_DISABLED
 upload_protocol             = cmsis-dap
 debug_tool                  = cmsis-dap