diff --git a/targets/CMSIS-OS/ChibiOS/MBN_QUAIL/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/MBN_QUAIL/CMakeLists.txt
index b9aab17f07..527f0a61e3 100644
--- a/targets/CMSIS-OS/ChibiOS/MBN_QUAIL/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/MBN_QUAIL/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files
diff --git a/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/CMakeLists.txt
index 8ea02b89ee..5bcc60ac01 100644
--- a/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/NETDUINO3_WIFI/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files
diff --git a/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/CMakeLists.txt
index 9ea34e8541..120734ff23 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/ST_NUCLEO144_F746ZG/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files
diff --git a/targets/CMSIS-OS/ChibiOS/ST_NUCLEO64_F091RC/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/ST_NUCLEO64_F091RC/CMakeLists.txt
index 304780ae1a..65ffcf59c5 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_NUCLEO64_F091RC/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/ST_NUCLEO64_F091RC/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files
diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/CMakeLists.txt
index 4165d250a0..9e6a4ca254 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F429I_DISCOVERY/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files
diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/CMakeLists.txt
index 2ae52479b1..fb36058b65 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F4_DISCOVERY/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files
diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/CMakeLists.txt b/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/CMakeLists.txt
index 7efb05105b..831fa1d86e 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/CMakeLists.txt
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/CMakeLists.txt
@@ -179,7 +179,7 @@ nf_set_linker_options(${NANOCLR_PROJECT_NAME}.elf TRUE)
 ###################################################
 # the size of the CLR managed heap is defined here
 ###################################################
-set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x400")
+set_property(TARGET ${NANOBOOTER_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x400,--defsym=__crt_heap_size__=0x1000")
 set_property(TARGET ${NANOCLR_PROJECT_NAME}.elf APPEND_STRING PROPERTY LINK_FLAGS ",--defsym=__main_stack_size__=0x400,--defsym=__process_stack_size__=0x800,--defsym=__crt_heap_size__=0x1800")
 
 # generate output files