diff --git a/src/url/urlRule.ts b/src/url/urlRule.ts
index 56708347..60e94af2 100644
--- a/src/url/urlRule.ts
+++ b/src/url/urlRule.ts
@@ -30,7 +30,7 @@ import {
  * @internalapi
  */
 export class UrlRuleFactory {
-  static isUrlRule = (obj) => obj && ['type', 'match', 'handler'].every((key) => isDefined(obj[key]));
+  static isUrlRule = obj => obj && ['type', 'match', 'handler'].every(key => isDefined(obj[key]));
 
   constructor(public router: UIRouter) {}
 
@@ -108,9 +108,9 @@ export class UrlRuleFactory {
     // - Some optional parameters, some matched
     // - Some optional parameters, all matched
     function matchPriority(params: RawParams): number {
-      const optional = urlMatcher.parameters().filter((param) => param.isOptional);
+      const optional = urlMatcher.parameters().filter(param => param.isOptional);
       if (!optional.length) return 0.000001;
-      const matched = optional.filter((param) => params[param.id]);
+      const matched = optional.filter(param => params[param.id]);
       return matched.length / optional.length;
     }
 
@@ -216,7 +216,7 @@ export class BaseUrlRule implements UrlRule {
   _group: number;
   type: UrlRuleType = 'RAW';
   handler: UrlRuleHandlerFn;
-  matchPriority = (match) => 0 - this.$id;
+  matchPriority = match => 0 - this.$id;
 
   constructor(public match: UrlRuleMatchFn, handler?: UrlRuleHandlerFn) {
     this.handler = handler || identity;
diff --git a/test/urlRuleSpec.ts b/test/urlRuleSpec.ts
index f47603c5..99925f96 100644
--- a/test/urlRuleSpec.ts
+++ b/test/urlRuleSpec.ts
@@ -70,7 +70,7 @@ describe('UrlRuleFactory', () => {
 
     it('should create a UrlRule from a UrlRuleMatchFn', () => {
       const factory = setup();
-      const rule = factory.create((url) => url.path === '/foo/bar/baz');
+      const rule = factory.create(url => url.path === '/foo/bar/baz');
       expect(rule.type).toBe('RAW');
       expect(rule.match({ path: '/foo/bar/baz' })).toBeTruthy();
       expect(rule.match({ path: '/nope/bar/baz' })).toBeFalsy();