diff --git a/configs/imxrt1020-evk_defconfig b/configs/imxrt1020-evk_defconfig
index 5bef665bc0..3c490bf6b2 100644
--- a/configs/imxrt1020-evk_defconfig
+++ b/configs/imxrt1020-evk_defconfig
@@ -1,7 +1,7 @@
 CONFIG_ARM=y
 CONFIG_ARCH_IMXRT=y
 CONFIG_SYS_TEXT_BASE=0x80002000
-CONFIG_SYS_MALLOC_LEN=0x100000
+CONFIG_SYS_MALLOC_LEN=0x40000
 CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL_GPIO=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
diff --git a/configs/imxrt1050-evk_defconfig b/configs/imxrt1050-evk_defconfig
index 118e7177a2..7193e93755 100644
--- a/configs/imxrt1050-evk_defconfig
+++ b/configs/imxrt1050-evk_defconfig
@@ -3,7 +3,7 @@ CONFIG_SYS_DCACHE_OFF=y
 # CONFIG_SPL_SYS_DCACHE_OFF is not set
 CONFIG_ARCH_IMXRT=y
 CONFIG_SYS_TEXT_BASE=0x80002000
-CONFIG_SYS_MALLOC_LEN=0x100000
+CONFIG_SYS_MALLOC_LEN=0x40000
 CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL_GPIO=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y