diff --git a/types/js-cookie/index.d.ts b/types/js-cookie/index.d.ts
index 6cd3c89169..5b871f8265 100644
--- a/types/js-cookie/index.d.ts
+++ b/types/js-cookie/index.d.ts
@@ -79,7 +79,7 @@ declare namespace Cookies {
          * or SDK. Note: The noConflict method is not necessary when using
          * AMD or CommonJS, thus it is not exposed in those environments.
          */
-        noConflict(): CookiesStatic;
+        noConflict?(): CookiesStatic;
 
         /**
          * Create a new instance of the api that overrides the default
@@ -88,10 +88,11 @@ declare namespace Cookies {
          * will run the converter first for each cookie. The returned
          * string will be used as the cookie value.
          */
-        withConverter(converter: CookieConverter | { write: CookieConverter; read: CookieConverter; }): CookiesStatic;
+        withConverter(converter: CookieReadConverter | { write: CookieWriteConverter; read: CookieReadConverter; }): CookiesStatic;
     }
 
-    type CookieConverter = (value: string, name: string) => string;
+    type CookieWriteConverter = (value: string | object, name: string) => string;
+    type CookieReadConverter = (value: string, name: string) => string;
 }
 
 declare const Cookies: Cookies.CookiesStatic;
diff --git a/types/js-cookie/js-cookie-tests.ts b/types/js-cookie/js-cookie-tests.ts
index 683b401d8b..a1b15957c6 100644
--- a/types/js-cookie/js-cookie-tests.ts
+++ b/types/js-cookie/js-cookie-tests.ts
@@ -19,8 +19,7 @@ Cookies.get();
 Cookies.remove('name');
 Cookies.remove('name', { path: '' });
 
-const Cookies2 = Cookies.noConflict();
-Cookies2; // $ExpectType CookiesStatic
+const Cookies2: Cookies.CookiesStatic = (Cookies.noConflict as () => Cookies.CookiesStatic)();
 
 Cookies.set('name', { foo: 'bar' });
 
@@ -41,11 +40,11 @@ Cookies.defaults.path = '';
 delete Cookies.defaults.path;
 
 const PHPCookies = Cookies.withConverter({
-    write(value) {
-        return encodeURIComponent(value)
+    write(value: string | object) {
+        return encodeURIComponent(value as string)
             .replace(/%(23|24|26|3A|3C|3E|3D|2F|3F|40|5B|5D|5E|60|7B|7D|7C)/g, decodeURIComponent);
     },
-    read(value) {
+    read(value: string) {
         return value
             .replace(/\+/g, ' ')
             .replace(/(%[0-9A-Z]{2})+/g, decodeURIComponent);