diff --git a/example/package-lock.json b/example/package-lock.json
index ff69fd8..276e963 100644
--- a/example/package-lock.json
+++ b/example/package-lock.json
@@ -11684,9 +11684,9 @@
       }
     },
     "redux-dynamic": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/redux-dynamic/-/redux-dynamic-0.1.0.tgz",
-      "integrity": "sha512-pn4bINzQN7QSZ28y7qUgzqUUyvCxYh2XLIMkwoWJrdeCAeHFVrapnirsS0YRirHoyZCb/PyqcDosMyDdpULg1Q==",
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/redux-dynamic/-/redux-dynamic-0.2.3.tgz",
+      "integrity": "sha512-8+V6xRLpFKaKL7OeN9TAdRJCxXNXOLbLTkVbkzEnH0ABoleThG3wlcNoiuoXxDybx6oGizQQfR0OYmo/iBPFrA==",
       "requires": {
         "redux": ">=3.0.0",
         "redux-dynamic-middlewares": ">=1.0.0",
diff --git a/example/package.json b/example/package.json
index 552a84c..33874db 100644
--- a/example/package.json
+++ b/example/package.json
@@ -8,7 +8,7 @@
     "react-loadable": "5.5.0",
     "react-redux": "5.0.7",
     "react-scripts": "2.0.4",
-    "redux-dynamic": "0.1.0"
+    "redux-dynamic": "0.2.3"
   },
   "scripts": {
     "start": "react-scripts start",
diff --git a/example/src/module-two/index.js b/example/src/module-two/index.js
index 32b54f5..40ef101 100644
--- a/example/src/module-two/index.js
+++ b/example/src/module-two/index.js
@@ -2,18 +2,26 @@ import * as actions from './actions';
 import * as constants from './constants';
 import * as selectors from './selectors';
 import middleware from './middleware';
-import reducer from './reducer';
+import reducer, { initialState as state } from './reducer';
 import Container from './container';
 
 const reducers = {
     [constants.STORE_KEY]: reducer
 };
 
+const initialState = {
+    [constants.STORE_KEY]: {
+        ...state,
+        someParam: true
+    }
+}
+
 const thunkConfig = {
     requestTwoApi: () => new Promise(res => setTimeout(res, 2000))
 };
 
 export {
+    initialState,
     actions,
     constants,
     middleware,
diff --git a/package.json b/package.json
index 94b5cef..f4b8a46 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "redux-dynamic",
-  "version": "0.1.1",
+  "version": "0.2.3",
   "description": "Allow add or remove redux modules dynamically",
   "main": "lib/index.js",
   "scripts": {
diff --git a/src/create-attach.js b/src/create-attach.js
index 38d2161..2c62a5a 100644
--- a/src/create-attach.js
+++ b/src/create-attach.js
@@ -2,11 +2,16 @@ import { combineReducers } from 'redux'
 import thunkMiddleware from 'redux-thunk'
 
 const createAttach = (data, store, dynamicMiddlewares) => ({
+  initialState = {},
   reducers = {},
   thunkConfig = {},
   middleware,
 }) => {
-  const nextReducers = { ...data.reducers, ...reducers }
+  const nextReducers = Object.keys(reducers)
+    .reduce((acc, key) => {
+      acc[key] = (state = initialState[key], action) => reducers[key](state, action)
+      return acc
+    }, { ...data.reducers })
   store.replaceReducer(combineReducers(nextReducers))
 
   const nextThunkConfig = { ...data.thunkConfig, ...thunkConfig }