diff --git a/extlib/benz/include/picrin/config.h b/extlib/benz/include/picrin/config.h
index 4645ffcc..16d872c2 100644
--- a/extlib/benz/include/picrin/config.h
+++ b/extlib/benz/include/picrin/config.h
@@ -126,7 +126,7 @@
 #endif
 
 #ifndef PIC_HEAP_PAGE_SIZE
-# define PIC_HEAP_PAGE_SIZE (2 * 1024 * 1024)
+# define PIC_HEAP_PAGE_SIZE (4 * 1024 * 1024)
 #endif
 
 #ifndef PIC_PAGE_REQUEST_THRESHOLD