diff --git a/proxyclient/linux.py b/proxyclient/linux.py
index 380a3e3..c56dd74 100755
--- a/proxyclient/linux.py
+++ b/proxyclient/linux.py
@@ -51,7 +51,7 @@ print("Loading DTB to 0x%x..." % dtb_addr)
 
 iface.writemem(dtb_addr, dtb)
 
-kernel_size = 32 * 1024 * 1024
+kernel_size = 512 * 1024 * 1024
 kernel_base = u.memalign(2 * 1024 * 1024, kernel_size)
 
 print("Kernel_base: 0x%x" % kernel_base)
diff --git a/proxyclient/utils.py b/proxyclient/utils.py
index 6f18d15..7d3ee36 100644
--- a/proxyclient/utils.py
+++ b/proxyclient/utils.py
@@ -25,7 +25,7 @@ class ProxyUtils(object):
         # clash with Python (m1n1 will normally not use *any* heap when running proxy ops though,
         # except when running very high-level operations like booting a kernel, so this should be
         # OK).
-        self.heap_size = 128 * 1024 * 1024
+        self.heap_size = 1024 * 1024 * 1024
         try:
             self.heap_base = p.heapblock_alloc(0)
         except ProxyRemoteError: