diff --git a/posix-runner/posix-runner.c b/posix-runner/posix-runner.c
index e8dc7d8..826be42 100644
--- a/posix-runner/posix-runner.c
+++ b/posix-runner/posix-runner.c
@@ -16,7 +16,7 @@
 
 void* syscall_table;
 
-#define MAX_MEMORY_PER_PROC (128 * 1024 * 1024)
+#define MAX_MEMORY_PER_PROC (768 * 1024 * 1024)
 #define __FILEDES_MAX 4096
 
 struct mem_block {