diff --git a/include/config.h b/include/config.h
index 867cea52..eb6498a5 100644
--- a/include/config.h
+++ b/include/config.h
@@ -18,7 +18,7 @@
 #define PIC_NONE_IS_FALSE 1
 
 /* initial memory size (to be dynamically extended if necessary) */
-#define PIC_ARENA_SIZE 100
+#define PIC_ARENA_SIZE 1000
 #define PIC_HEAP_PAGE_SIZE (10000)
 #define PIC_STACK_SIZE 1024
 #define PIC_RESCUE_SIZE 30