diff --git a/STM32/boards.txt b/STM32/boards.txt
index cb6b54d..2c2a821 100644
--- a/STM32/boards.txt
+++ b/STM32/boards.txt
@@ -117,8 +117,8 @@ BLACK_F407VE.name=BLACK F407VE (upload: STLink)
 BLACK_F407VE.vid.0=0x0483
 BLACK_F407VE.pid.0=0x5711
 
-BLACK_F407VE.upload.maximum_size=1048576
-BLACK_F407VE.upload.maximum_data_size=196608
+BLACK_F407VE.upload.maximum_size=524288
+BLACK_F407VE.upload.maximum_data_size=131072
 
 BLACK_F407VE.build.mcu=cortex-m4
 BLACK_F407VE.build.core=arduino
diff --git a/STM32/variants/BLACK_F407VE/ldscript.ld b/STM32/variants/BLACK_F407VE/ldscript.ld
index 5bb1531..2ebf6a1 100644
--- a/STM32/variants/BLACK_F407VE/ldscript.ld
+++ b/STM32/variants/BLACK_F407VE/ldscript.ld
@@ -2,13 +2,13 @@
 ENTRY(Reset_Handler)
 
 /* Highest address of the user mode stack */
-_estack = 0x20010000;    /* end of RAM */
+_estack = 0x20000000 + 131072;    /* end of RAM */
 
 /* Specify the memory areas */
 MEMORY
 {
-FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 128K
-RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 32K
+FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 512K
+RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 128K
 }
 
 /* Define output sections */