diff --git a/types/js-cookie/index.d.ts b/types/js-cookie/index.d.ts
index 6cd3c89169..7b90b4ecd5 100644
--- a/types/js-cookie/index.d.ts
+++ b/types/js-cookie/index.d.ts
@@ -33,7 +33,7 @@ declare namespace Cookies {
         secure?: boolean;
     }
 
-    interface CookiesStatic {
+    interface CookiesStatic<T extends object = object> {
         /**
          * Allows default cookie attributes to be accessed, changed, or reset
          */
@@ -42,7 +42,7 @@ declare namespace Cookies {
         /**
          * Create a cookie
          */
-        set(name: string, value: string | object, options?: CookieAttributes): void;
+        set(name: string, value: string | T, options?: CookieAttributes): void;
 
         /**
          * Read cookie
@@ -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<T>;
 
         /**
          * 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<TConv extends object>(converter: CookieReadConverter | { write: CookieWriteConverter<TConv>; read: CookieReadConverter; }): CookiesStatic<TConv>;
     }
 
-    type CookieConverter = (value: string, name: string) => string;
+    type CookieWriteConverter<T extends object> = (value: string | T, 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..df30d90975 100644
--- a/types/js-cookie/js-cookie-tests.ts
+++ b/types/js-cookie/js-cookie-tests.ts
@@ -19,8 +19,8 @@ Cookies.get();
 Cookies.remove('name');
 Cookies.remove('name', { path: '' });
 
-const Cookies2 = Cookies.noConflict();
-Cookies2; // $ExpectType CookiesStatic
+const Cookies2 = Cookies.noConflict!();
+Cookies2; // $ExpectType CookiesStatic<object>
 
 Cookies.set('name', { foo: 'bar' });
 
@@ -40,12 +40,14 @@ cookies.get('escaped');
 Cookies.defaults.path = '';
 delete Cookies.defaults.path;
 
-const PHPCookies = Cookies.withConverter({
+const PHPCookies = Cookies.withConverter<object>({
     write(value) {
-        return encodeURIComponent(value)
+        value; // $ExpectType 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) {
+        value; // $ExpectType string
         return value
             .replace(/\+/g, ' ')
             .replace(/(%[0-9A-Z]{2})+/g, decodeURIComponent);