diff --git a/package.json b/package.json
index d734ba70..faf01476 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fre",
-  "version": "2.1.0-beta3",
+  "version": "2.1.0",
   "type": "module",
   "main": "dist/fre.js",
   "unpkg": "dist/fre.umd.js",
diff --git a/src/commit.ts b/src/commit.ts
index 43330301..8db07f35 100644
--- a/src/commit.ts
+++ b/src/commit.ts
@@ -14,7 +14,7 @@ export const commit = (fiber: IFiber): void => {
 const insert = (fiber: IFiber): void => {
   let s = fiber.s
   if (s) {
-    if (isFn(s.type)) {
+    if (s.isComp) {
       s = getKid(s)
     }
     s.prev = fiber
@@ -42,7 +42,7 @@ const kidsRefer = (kids: any): void => {
 }
 
 const remove = (d) => {
-  if (isFn(d.type)) {
+  if (d.isComp) {
     if (d.lane & LANE.REMOVE) {
       if (d.hooks) {
         d.hooks.list.forEach((e) => e[2] && e[2]())
diff --git a/src/h.ts b/src/h.ts
index 697c589c..4eb9d978 100644
--- a/src/h.ts
+++ b/src/h.ts
@@ -1,4 +1,4 @@
-import { isStr, arrayfy, isFn } from "./reconcile"
+import { isStr, arrayfy } from "./reconcile"
 import { FreElement } from "./type"
 
 // for jsx2