diff --git a/README.md b/README.md
index 66cf407..9158d7e 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ yarn add svelte-router
   import Home from './Home.html'
   import Welcome from './Welcome.html'
   import Animal from './Animal.html'
+  import NotFound from './NotFound.html'
 
   const { createRouter, RouterLink } = SvelteRouter
 
@@ -53,6 +54,9 @@ yarn add svelte-router
         }
       })
     }
+  },{
+    pathRegex: '[a-zA-Z]+',
+    defaultRoute: NotFound
   })
 
   export default {
diff --git a/example/app.html b/example/app.html
index a6ffe44..d7ed084 100644
--- a/example/app.html
+++ b/example/app.html
@@ -36,9 +36,11 @@
         data: {
           salutation: 'Hello'
         }
-      },
-    },
-    default: NotFound
+      }
+    }
+  },{
+    pathRegex: '[a-zA-Z]+',
+    defaultRoute: NotFound
   })
   createRouter.listen(() => {
     console.log('router changed')
diff --git a/package.json b/package.json
index 7bdf54a..ba02f74 100644
--- a/package.json
+++ b/package.json
@@ -43,11 +43,11 @@
     "koa-router": "^7.4.0",
     "nodemon": "^1.14.11",
     "rimraf": "^2.6.2",
-    "rollup": "^0.55.1",
+    "rollup": "^0.56.3",
     "rollup-plugin-babel": "^3.0.3",
     "rollup-plugin-commonjs": "^8.3.0",
     "rollup-plugin-eslint": "^4.0.0",
-    "rollup-plugin-node-resolve": "^3.0.2",
+    "rollup-plugin-node-resolve": "^3.0.3",
     "rollup-plugin-replace": "^2.0.0",
     "rollup-plugin-svelte": "^4.0.0",
     "rollup-plugin-uglify": "^3.0.0",
diff --git a/src/utils/create-router.js b/src/utils/create-router.js
index 84b54c8..2898df8 100644
--- a/src/utils/create-router.js
+++ b/src/utils/create-router.js
@@ -1,22 +1,19 @@
 import history from './history'
 
-const DYNAMIC_PATH_REGEX = '[a-zA-Z]+'
-const DEFAULT_ROUTE = 'default'
-
-const getPathRegex = (sections) => {
+const getPathRegex = (sections, pathRegex) => {
   return sections.map((value) => {
-    if (value.match(new RegExp(`:${DYNAMIC_PATH_REGEX}`)) !== null) {
-      return `([a-zA-Z0-9]+)`
+    if (value.match(new RegExp(`:${pathRegex}`)) !== null) {
+      return `(${pathRegex})`
     }
     return value
   }).join('\\/')
 }
 
-const getPathVariables = (sections, matches) => {
+const getPathVariables = (sections, matches, pathRegex) => {
   const keys = sections.filter((value) => {
-    return value.match(new RegExp(`:${DYNAMIC_PATH_REGEX}`)) !== null
+    return value.match(new RegExp(`:${pathRegex}`)) !== null
   }).map((value) => {
-    return value.match(new RegExp(`:(${DYNAMIC_PATH_REGEX})`))[1]
+    return value.match(new RegExp(`:(${pathRegex})`))[1]
   })
   const pathVariables = {}
   keys.forEach((value, index) => {
@@ -26,9 +23,9 @@ const getPathVariables = (sections, matches) => {
   return pathVariables
 }
 
-const getContent = (options, path, target, pathVariables) => {
-  let { Component, props } = options[path]
-  if (!Component) Component = options[path]
+const getContent = (paths, path, target, pathVariables) => {
+  let { Component, props } = paths[path]
+  if (!Component) Component = paths[path]
   let extraData = {
     data: {
       path: pathVariables
@@ -46,30 +43,33 @@ const getContent = (options, path, target, pathVariables) => {
   })
 }
 
-const createRouter = options => {
+const createRouter = (paths, options = {}) => {
   let _target // target DOM
   let _unlisten // history listener
   let _content // route instance
 
+  const pathRegex = options['pathRegex'] ? options['pathRegex'] : '[a-zA-Z0-9]+'
+  const defaultRoute = options['defaultRoute'] ? options['defaultRoute'] : 'default'
+
   const handleRouteChange = location => {
     let found = false
     if (_content) _content.destroy()
 
-    for (let path in options) {
-      if (Object.prototype.hasOwnProperty.call(options, path)) {
+    for (let path in paths) {
+      if (Object.prototype.hasOwnProperty.call(paths, path)) {
         const sections = path.split('/')
-        const regexPath = getPathRegex(sections)
+        const regexPath = getPathRegex(sections, pathRegex)
         const matches = location.pathname.match(new RegExp(`^${regexPath}$`))
         if (matches !== null) {
-          const pathVariables = getPathVariables(sections, matches)
-          _content = getContent(options, path, _target, pathVariables)
+          const pathVariables = getPathVariables(sections, matches, pathRegex)
+          _content = getContent(paths, path, _target, pathVariables)
           found = true
           break
         }
       }
     }
-    if (!found && options[DEFAULT_ROUTE]) {
-      _content = getContent(options, DEFAULT_ROUTE, _target, {})
+    if (!found && paths[defaultRoute]) {
+      _content = getContent(paths, defaultRoute, _target, {})
     }
   }