diff --git a/src/system/boot/loader/heap.cpp b/src/system/boot/loader/heap.cpp
index 644ee3d2bc..4b201a8767 100644
--- a/src/system/boot/loader/heap.cpp
+++ b/src/system/boot/loader/heap.cpp
@@ -53,9 +53,9 @@
 const static size_t kAlignment = 8;
 	// all memory chunks will be a multiple of this
 
-const static size_t kDefaultHeapSize = (1024 + 256) * 1024;
+const static size_t kDefaultHeapSize = (1024 + 512) * 1024;
 	// default initial heap size, unless overridden by platform loader
-const static size_t kLargeAllocationThreshold = 16 * 1024;
+const static size_t kLargeAllocationThreshold = 128 * 1024;
 	// allocations of this size or larger are allocated via
 	// platform_allocate_region()