diff --git a/zephyr/Kconfig b/zephyr/Kconfig
index 665d404ef35e..3f8e65edb17e 100644
--- a/zephyr/Kconfig
+++ b/zephyr/Kconfig
@@ -83,7 +83,7 @@ config SOF_ZEPHYR_VIRTUAL_HEAP_SIZE
 config SOF_ZEPHYR_VIRTUAL_HEAP_REGION_SIZE
 	hex "Size in bytes of virtual memory region for virtual heap shared for all cores"
 	depends on MM_DRV_INTEL_ADSP_MTL_TLB
-	default 0x100000
+	default 0x180000
 	help
 	  This config defines size of virtual heap region shared between all cores
 
diff --git a/zephyr/lib/alloc.c b/zephyr/lib/alloc.c
index 8a2fed79ee41..1a9a5b6d35b8 100644
--- a/zephyr/lib/alloc.c
+++ b/zephyr/lib/alloc.c
@@ -346,7 +346,8 @@ static const struct vmh_heap_config static_hp_buffers = {
 		{ 2048, 8},
 		{ 4096, 11},
 		{ 8192, 10},
-		{ 65536, 3},
+		{ 32768, 8},
+		{ 65536, 7},
 		{ 131072, 1},
 		{ 524288, 1} /* buffer for kpb */
 	},