diff --git a/quickjs.c b/quickjs.c
index fb42ff8da..21bee5d2b 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -4430,7 +4430,7 @@ static inline JSShapeProperty *get_shape_prop(JSShape *sh)
 
 static int init_shape_hash(JSRuntime *rt)
 {
-    rt->shape_hash_bits = 4;   /* 16 shapes */
+    rt->shape_hash_bits = 6;   /* 64 shapes */
     rt->shape_hash_size = 1 << rt->shape_hash_bits;
     rt->shape_hash_count = 0;
     rt->shape_hash = js_mallocz_rt(rt, sizeof(rt->shape_hash[0]) *