diff --git a/package.json b/package.json
index 2d171e3..e0fa0e7 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "@modal-sh/oatmeal",
+  "name": "@modal-sh/oatmeal-core",
   "version": "0.0.0",
   "files": [
     "dist",
@@ -48,5 +48,22 @@
   },
   "dependencies": {
     "xml-js": "^1.6.11"
+  },
+  "types": "./dist/types/index.d.ts",
+  "main": "./dist/cjs/production/index.js",
+  "module": "./dist/esm/production/index.js",
+  "exports": {
+    ".": {
+      "development": {
+        "require": "./dist/cjs/development/index.js",
+        "import": "./dist/esm/development/index.js"
+      },
+      "require": "./dist/cjs/production/index.js",
+      "import": "./dist/esm/production/index.js",
+      "types": "./dist/types/index.d.ts"
+    }
+  },
+  "typesVersions": {
+    "*": {}
   }
 }
diff --git a/src/common.ts b/src/common.ts
index c370510..ec84109 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -3,6 +3,6 @@ export interface TypeOptions {
 }
 
 export interface SerializeType<Options extends TypeOptions = TypeOptions> {
-  serialize: <T>(data: T, options: Options) => Promise<string>;
-  deserialize: <T>(serialized: string, options: Options) => Promise<T>;
+  serialize: <T>(data: T, options: Options) => string;
+  deserialize: <T>(serialized: string, options: Options) => T;
 }
diff --git a/src/index.ts b/src/index.ts
index 2474a59..fdae9ab 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,40 +1,38 @@
 import { TypeOptions, SerializeType } from 'src/common';
+import * as applicationJson from 'src/types/application/json';
+import * as applicationXml from 'src/types/application/xml';
+import * as applicationXWwwFormUrlencoded from 'src/types/application/x-www-form-urlencoded';
 
-interface LoadSerializeModule<T extends SerializeType> {
-  (): Promise<T>;
-}
-
-const TYPES: Record<string, LoadSerializeModule<SerializeType>> = {
-  'application/json': () => import('src/types/application/json'),
-  'text/json': () => import('src/types/application/json'),
-  'application/xml': () => import('src/types/application/xml'),
-  'text/xml': () => import('src/types/application/xml'),
+const TYPES: Record<string, SerializeType> = {
+  'application/json': applicationJson,
+  'text/json': applicationJson,
+  'application/xml': applicationXml,
+  'text/xml': applicationXml,
+  'application/x-www-form-urlencoded': applicationXWwwFormUrlencoded,
 };
 
 export const AVAILABLE_TYPES: (keyof typeof TYPES)[] = Object.keys(TYPES);
 
-export const serialize = async <T, O extends TypeOptions = TypeOptions>(
+export const serialize = <T, O extends TypeOptions = TypeOptions>(
   data: T,
   options: O,
-): Promise<string> => {
+): string => {
   const { type: optionsType } = options;
-  const { [optionsType]: loadType } = TYPES;
-  if (!loadType) {
+  const { [optionsType]: serializeType } = TYPES;
+  if (!serializeType) {
     throw new Error(`Unsupported type: ${optionsType}`);
   }
-  const serializeType = await loadType();
   return serializeType.serialize(data, options);
 };
 
-export const deserialize = async <T, O extends TypeOptions = TypeOptions>(
+export const deserialize = <T, O extends TypeOptions = TypeOptions>(
   serialized: string,
   options: O,
-): Promise<T> => {
+): T => {
   const { type: optionsType } = options;
-  const { [optionsType]: loadType } = TYPES;
-  if (!loadType) {
+  const { [optionsType]: serializeType } = TYPES;
+  if (!serializeType) {
     throw new Error(`Unsupported type: ${optionsType}`);
   }
-  const serializeType = await loadType();
   return serializeType.deserialize<T>(serialized, options);
 };
diff --git a/src/types/application/json.ts b/src/types/application/json.ts
index 0efae2c..bdb7346 100644
--- a/src/types/application/json.ts
+++ b/src/types/application/json.ts
@@ -9,22 +9,22 @@ interface SerializeApplicationJsonOptions extends CommonApplicationJsonOptions {
   replacer?: (key: string, value: unknown) => unknown;
 }
 
-export const serialize = async <T, O extends TypeOptions = SerializeApplicationJsonOptions>(
+export const serialize = <T, O extends TypeOptions = SerializeApplicationJsonOptions>(
   data: T,
   options = {} as O,
-): Promise<string> => {
+): string => {
   const theOptions = options as SerializeApplicationJsonOptions;
-  return Promise.resolve(JSON.stringify(data, theOptions.replacer, theOptions.indent));
+  return JSON.stringify(data, theOptions.replacer, theOptions.indent);
 };
 
 interface DeserializeApplicationJsonOptions extends CommonApplicationJsonOptions {
   reviver?: (key: string, value: unknown) => unknown;
 }
 
-export const deserialize = async <T, O extends TypeOptions = DeserializeApplicationJsonOptions>(
+export const deserialize = <T, O extends TypeOptions = DeserializeApplicationJsonOptions>(
   serialized: string,
   options = {} as O,
-): Promise<T> => {
+): T => {
   const theOptions = options as DeserializeApplicationJsonOptions;
-  return Promise.resolve(JSON.parse(serialized, theOptions.reviver) as T);
+  return JSON.parse(serialized, theOptions.reviver) as T;
 };
diff --git a/src/types/application/x-www-form-urlencoded.ts b/src/types/application/x-www-form-urlencoded.ts
new file mode 100644
index 0000000..748fe93
--- /dev/null
+++ b/src/types/application/x-www-form-urlencoded.ts
@@ -0,0 +1,16 @@
+export const serialize = <T>(
+  data: T,
+): string => {
+  if (typeof data !== 'object') {
+    throw new TypeError('Data must be an object');
+  }
+  return new URLSearchParams(data as Record<string, string>).toString();
+}
+
+export const deserialize = <T>(
+  serialized: string,
+): T => {
+  return Object.fromEntries(
+    new URLSearchParams(serialized).entries()
+  ) as unknown as T;
+}
diff --git a/src/types/application/xml.ts b/src/types/application/xml.ts
index ee2a772..a7a84e2 100644
--- a/src/types/application/xml.ts
+++ b/src/types/application/xml.ts
@@ -1,4 +1,4 @@
-import type { Element } from 'xml-js';
+import { js2xml, xml2js, type Element } from 'xml-js';
 import { TypeOptions } from 'src/common';
 
 interface CommonApplicationXmlOptions extends TypeOptions {
@@ -119,11 +119,10 @@ parseElement = (element: Element, allowValueOverride = false): unknown => {
   );
 };
 
-export const serialize = async <T, O extends TypeOptions = SerializeApplicationXmlOptions>(
+export const serialize = <T, O extends TypeOptions = SerializeApplicationXmlOptions>(
   data: T,
   options = {} as O,
-): Promise<string> => {
-  const { js2xml } = await import('xml-js');
+): string => {
   const { indent, rootElementName = 'root' } = options as SerializeApplicationXmlOptions;
 
   return js2xml(
@@ -139,11 +138,10 @@ interface DeserializeApplicationXmlOptions extends CommonApplicationXmlOptions {
   allowValueOverride?: boolean;
 }
 
-export const deserialize = async <T, O extends TypeOptions = DeserializeApplicationXmlOptions>(
+export const deserialize = <T, O extends TypeOptions = DeserializeApplicationXmlOptions>(
   serialized: string,
   options = {} as O,
-): Promise<T> => {
-  const { xml2js } = await import('xml-js');
+): T => {
   const { allowValueOverride } = options as DeserializeApplicationXmlOptions;
   const rawElements = xml2js(serialized, {
     compact: false,
diff --git a/test/application/json.test.ts b/test/application/json.test.ts
index c07670d..2471b4d 100644
--- a/test/application/json.test.ts
+++ b/test/application/json.test.ts
@@ -3,65 +3,65 @@ import { deserialize, serialize } from '../../src/types/application/json';
 
 describe('application/json', () => {
   describe('serialize', () => {
-    it('should serialize a string', async () => {
-      const result = await serialize('Hello, World!', { type: 'application/json' });
+    it('should serialize a string', () => {
+      const result = serialize('Hello, World!', { type: 'application/json' });
       expect(result).toBe('"Hello, World!"');
     });
 
-    it('should serialize a number', async () => {
-      const result = await serialize(123, { type: 'application/json' });
+    it('should serialize a number', () => {
+      const result = serialize(123, { type: 'application/json' });
       expect(result).toBe('123');
     });
 
-    it('should serialize a boolean', async () => {
-      const result = await serialize(true, { type: 'application/json' });
+    it('should serialize a boolean', () => {
+      const result = serialize(true, { type: 'application/json' });
       expect(result).toBe('true');
     });
 
-    it('should serialize an array', async () => {
-      const result = await serialize([1, 2, 3], { type: 'application/json' });
+    it('should serialize an array', () => {
+      const result = serialize([1, 2, 3], { type: 'application/json' });
       expect(result).toBe('[1,2,3]');
     });
 
-    it('should serialize an object', async () => {
-      const result = await serialize({ a: 1, b: 2, c: 3 }, { type: 'application/json' });
+    it('should serialize an object', () => {
+      const result = serialize({ a: 1, b: 2, c: 3 }, { type: 'application/json' });
       expect(result).toBe('{"a":1,"b":2,"c":3}');
     });
 
-    it('should serialize an object with indent', async () => {
-      const result = await serialize({ a: 1, b: 2, c: 3 }, { type: 'application/json', indent: 2 });
+    it('should serialize an object with indent', () => {
+      const result = serialize({ a: 1, b: 2, c: 3 }, { type: 'application/json', indent: 2 });
       expect(result).toBe('{\n  "a": 1,\n  "b": 2,\n  "c": 3\n}');
     });
   });
 
   describe('deserialize', () => {
-    it('should deserialize a string', async () => {
-      const result = await deserialize<string>('"Hello, World!"', { type: 'application/json' });
+    it('should deserialize a string', () => {
+      const result = deserialize<string>('"Hello, World!"', { type: 'application/json' });
       expect(result).toBe('Hello, World!');
     });
 
-    it('should deserialize a number', async () => {
-      const result = await deserialize<number>('123', { type: 'application/json' });
+    it('should deserialize a number', () => {
+      const result = deserialize<number>('123', { type: 'application/json' });
       expect(result).toBe(123);
     });
 
-    it('should deserialize a boolean', async () => {
-      const result = await deserialize<boolean>('true', { type: 'application/json' });
+    it('should deserialize a boolean', () => {
+      const result = deserialize<boolean>('true', { type: 'application/json' });
       expect(result).toBe(true);
     });
 
-    it('should deserialize an array', async () => {
-      const result = await deserialize<number[]>('[1,2,3]', { type: 'application/json' });
+    it('should deserialize an array', () => {
+      const result = deserialize<number[]>('[1,2,3]', { type: 'application/json' });
       expect(result).toEqual([1, 2, 3]);
     });
 
-    it('should deserialize an object', async () => {
-      const result = await deserialize<{ a: number, b: number, c: number }>('{"a":1,"b":2,"c":3}', { type: 'application/json' });
+    it('should deserialize an object', () => {
+      const result = deserialize<{ a: number, b: number, c: number }>('{"a":1,"b":2,"c":3}', { type: 'application/json' });
       expect(result).toEqual({ a: 1, b: 2, c: 3 });
     });
 
-    it('should deserialize an object with indent', async () => {
-      const result = await deserialize<{ a: number, b: number, c: number }>(
+    it('should deserialize an object with indent', () => {
+      const result = deserialize<{ a: number, b: number, c: number }>(
         '{\n  "a": 1,\n  "b": 2,\n  "c": 3\n}',
         { type: 'application/json' },
       );
diff --git a/test/application/x-www-form-urlencoded.test.ts b/test/application/x-www-form-urlencoded.test.ts
new file mode 100644
index 0000000..6c3f616
--- /dev/null
+++ b/test/application/x-www-form-urlencoded.test.ts
@@ -0,0 +1,34 @@
+import { describe, expect, it } from 'vitest';
+import { deserialize, serialize } from '../../src/types/application/x-www-form-urlencoded';
+
+describe('application/x-www-form-urlencoded', () => {
+  describe('serialize', () => {
+    it('should throw when serializing a string', () => {
+      expect(() => serialize('Hello, World!')).toThrow();
+    });
+
+    it('should throw when serializing a number', () => {
+      expect(() => serialize(123)).toThrow();
+    });
+
+    it('should throw when serializing a boolean', () => {
+      expect(() => serialize(true)).toThrow();
+    });
+
+    it('should throw when serializing an array', () => {
+      expect(() => serialize([1, 2, 3])).toThrow();
+    });
+
+    it('should serialize an object', () => {
+      const result = serialize({ a: 1, b: 2, c: 3 });
+      expect(result).toBe('a=1&b=2&c=3');
+    });
+  });
+
+  describe('deserialize', () => {
+    it('should deserialize an object', () => {
+      const result = deserialize<{ a: string, b: string, c: string }>('a=1&b=2&c=3');
+      expect(result).toEqual({ a: '1', b: '2', c: '3' });
+    });
+  });
+});
diff --git a/test/application/xml.test.ts b/test/application/xml.test.ts
index f8b5c5b..cbe9938 100644
--- a/test/application/xml.test.ts
+++ b/test/application/xml.test.ts
@@ -3,38 +3,38 @@ import { serialize, deserialize } from '../../src/types/application/xml';
 
 describe('application/xml', () => {
   describe('serialize', () => {
-    it('should serialize a string', async () => {
-      const result = await serialize('Hello, World!', { type: 'application/xml' });
+    it('should serialize a string', () => {
+      const result = serialize('Hello, World!', { type: 'application/xml' });
       expect(result).toBe('<root type="string">Hello, World!</root>');
     });
 
-    it('should serialize a number', async () => {
-      const result = await serialize(123, { type: 'application/xml' });
+    it('should serialize a number', () => {
+      const result = serialize(123, { type: 'application/xml' });
       expect(result).toBe('<root type="number">123</root>');
     });
 
-    it('should serialize a boolean', async () => {
-      const result = await serialize(true, { type: 'application/xml' });
+    it('should serialize a boolean', () => {
+      const result = serialize(true, { type: 'application/xml' });
       expect(result).toBe('<root type="boolean">true</root>');
     });
 
-    it('should serialize an array', async () => {
-      const result = await serialize([1, 2, 3], { type: 'application/xml' });
+    it('should serialize an array', () => {
+      const result = serialize([1, 2, 3], { type: 'application/xml' });
       expect(result).toBe('<root array="array"><_0 type="number">1</_0><_1 type="number">2</_1><_2 type="number">3</_2></root>');
     });
 
-    it('should serialize an object', async () => {
-      const result = await serialize({ a: 1, b: 2, c: 3 }, { type: 'application/xml' });
+    it('should serialize an object', () => {
+      const result = serialize({ a: 1, b: 2, c: 3 }, { type: 'application/xml' });
       expect(result).toBe('<root type="object"><a type="number">1</a><b type="number">2</b><c type="number">3</c></root>');
     });
 
-    it('should serialize an object with a custom root element name', async () => {
-      const result = await serialize({ a: 1, b: 2, c: 3 }, { type: 'application/xml', rootElementName: 'fsh', });
+    it('should serialize an object with a custom root element name', () => {
+      const result = serialize({ a: 1, b: 2, c: 3 }, { type: 'application/xml', rootElementName: 'fsh', });
       expect(result).toBe('<fsh type="object"><a type="number">1</a><b type="number">2</b><c type="number">3</c></fsh>');
     });
 
-    it('should serialize an object with indent', async () => {
-      const result = await serialize({ a: 1, b: 2, c: 3 }, { type: 'application/xml', indent: 2 });
+    it('should serialize an object with indent', () => {
+      const result = serialize({ a: 1, b: 2, c: 3 }, { type: 'application/xml', indent: 2 });
       expect(result).toBe(`<root type="object">
   <a type="number">1</a>
   <b type="number">2</b>
@@ -44,28 +44,28 @@ describe('application/xml', () => {
   });
 
   describe('deserialize', () => {
-    it('should deserialize a string', async () => {
-      const result = await deserialize<string>('<root type="string">Hello, World!</root>', { type: 'application/xml' });
+    it('should deserialize a string', () => {
+      const result = deserialize<string>('<root type="string">Hello, World!</root>', { type: 'application/xml' });
       expect(result).toBe('Hello, World!');
     });
 
-    it('should deserialize a number', async () => {
-      const result = await deserialize<number>('<root type="number">123</root>', { type: 'application/xml' });
+    it('should deserialize a number', () => {
+      const result = deserialize<number>('<root type="number">123</root>', { type: 'application/xml' });
       expect(result).toBe(123);
     });
 
-    it('should deserialize a boolean', async () => {
-      const result = await deserialize<boolean>('<root type="boolean">true</root>', { type: 'application/xml' });
+    it('should deserialize a boolean', () => {
+      const result = deserialize<boolean>('<root type="boolean">true</root>', { type: 'application/xml' });
       expect(result).toBe(true);
     });
 
-    it('should deserialize an array', async () => {
-      const result = await deserialize<number[]>('<root array="array"><_0 type="number">1</_0><_1 type="number">2</_1><_2 type="number">3</_2></root>', { type: 'application/xml' });
+    it('should deserialize an array', () => {
+      const result = deserialize<number[]>('<root array="array"><_0 type="number">1</_0><_1 type="number">2</_1><_2 type="number">3</_2></root>', { type: 'application/xml' });
       expect(result).toEqual([1, 2, 3]);
     });
 
-    it('should deserialize an object', async () => {
-      const result = await deserialize<{ a: number, b: number, c: number }>(
+    it('should deserialize an object', () => {
+      const result = deserialize<{ a: number, b: number, c: number }>(
         '<root type="object"><a type="number">1</a><b type="number">2</b><c type="number">3</c></root>',
         { type: 'application/xml' },
       );