diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8841a9b..ee58304 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [7.0.2](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/compare/v7.0.1...v7.0.2) (2025-03-06)
+
+
+### Bug Fixes
+
+* better types ([9d009b3](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/commit/9d009b366a6f45b44d3120bda8450c28ceee6427))
+
 ### [7.0.1](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/compare/v7.0.0...v7.0.1) (2025-03-06)
 
 
diff --git a/package-lock.json b/package-lock.json
index 332218c..eee691a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "css-minimizer-webpack-plugin",
-  "version": "7.0.1",
+  "version": "7.0.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "css-minimizer-webpack-plugin",
-      "version": "7.0.1",
+      "version": "7.0.2",
       "license": "MIT",
       "dependencies": {
         "@jridgewell/trace-mapping": "^0.3.25",
diff --git a/package.json b/package.json
index 810656b..96c3ce6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "css-minimizer-webpack-plugin",
-  "version": "7.0.1",
+  "version": "7.0.2",
   "description": "CSS minimizer (minifier) plugin for Webpack",
   "license": "MIT",
   "repository": "webpack-contrib/css-minimizer-webpack-plugin",
diff --git a/src/index.js b/src/index.js
index 8a9f367..973f54c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -15,7 +15,7 @@ const {
 } = require("./utils");
 
 const schema = require("./options.json");
-const { minify: minifyWorker } = require("./minify");
+const { minify } = require("./minify");
 
 /** @typedef {import("schema-utils/declarations/validate").Schema} Schema */
 /** @typedef {import("webpack").Compiler} Compiler */
@@ -87,7 +87,7 @@ const { minify: minifyWorker } = require("./minify");
  * @param {Input} input
  * @param {RawSourceMap | undefined} sourceMap
  * @param {InferDefaultType<T>} minifyOptions
- * @returns {Promise<MinimizedResult>}
+ * @returns {Promise<MinimizedResult> | MinimizedResult}
  */
 
 /**
@@ -134,7 +134,7 @@ const { minify: minifyWorker } = require("./minify");
 
 /**
  * @template T
- * @typedef {JestWorker & { transform: (options: string) => InternalResult, minify: (options: InternalOptions<T>) => InternalResult }} MinimizerWorker
+ * @typedef {JestWorker & { transform: (options: string) => Promise<InternalResult>, minify: (options: InternalOptions<T>) => Promise<InternalResult> }} MinimizerWorker
  */
 
 /**
@@ -578,7 +578,7 @@ class CssMinimizerPlugin {
           try {
             result = await (getWorker
               ? getWorker().transform(getSerializeJavascript()(options))
-              : minifyWorker(options));
+              : minify(options));
           } catch (error) {
             const hasSourceMap =
               inputSourceMap && CssMinimizerPlugin.isSourceMap(inputSourceMap);
diff --git a/src/minify.js b/src/minify.js
index 000f0fd..8f76cbf 100644
--- a/src/minify.js
+++ b/src/minify.js
@@ -6,7 +6,7 @@
  * @param {import("./index.js").InternalOptions<T>} options
  * @returns {Promise<InternalResult>}
  */
-const minify = async (options) => {
+async function minify(options) {
   const minifyFns = Array.isArray(options.minimizer.implementation)
     ? options.minimizer.implementation
     : [options.minimizer.implementation];
@@ -59,7 +59,7 @@ const minify = async (options) => {
   }
 
   return result;
-};
+}
 
 /**
  * @param {string} options
diff --git a/src/utils.js b/src/utils.js
index a576746..8466f32 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -69,8 +69,8 @@ function throttleAll(limit, tasks) {
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function cssnanoMinify(
@@ -191,8 +191,8 @@ cssnanoMinify.supportsWorkerThreads = () => true;
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function cssoMinify(input, sourceMap, minimizerOptions) {
@@ -220,8 +220,8 @@ cssoMinify.supportsWorkerThreads = () => true;
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function cleanCssMinify(input, sourceMap, minimizerOptions) {
@@ -265,8 +265,8 @@ cleanCssMinify.supportsWorkerThreads = () => true;
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function esbuildMinify(input, sourceMap, minimizerOptions) {
@@ -359,8 +359,8 @@ esbuildMinify.supportsWorkerThreads = () => false;
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function parcelCssMinify(input, sourceMap, minimizerOptions) {
@@ -405,8 +405,8 @@ parcelCssMinify.supportsWorkerThreads = () => false;
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function lightningCssMinify(input, sourceMap, minimizerOptions) {
@@ -451,8 +451,8 @@ lightningCssMinify.supportsWorkerThreads = () => false;
 /* istanbul ignore next */
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 async function swcMinify(input, sourceMap, minimizerOptions) {
diff --git a/test/minify-option.test.js b/test/minify-option.test.js
index 6e26c88..855cda9 100644
--- a/test/minify-option.test.js
+++ b/test/minify-option.test.js
@@ -152,7 +152,7 @@ describe('"minify" option', () => {
         { test: ".three{background: white;}" },
       ],
       minify: [
-        async (data, inputMap, minimizerOptions) => {
+        (data, inputMap, minimizerOptions) => {
           const [input] = Object.values(data);
           return {
             code: `${input}\n.one{color: red;}\n${minimizerOptions.test}\n`,
diff --git a/types/index.d.ts b/types/index.d.ts
index 8ff1703..c34d48c 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -179,7 +179,7 @@ type BasicMinimizerImplementation<T> = (
   input: Input,
   sourceMap: RawSourceMap | undefined,
   minifyOptions: InferDefaultType<T>,
-) => Promise<MinimizedResult>;
+) => Promise<MinimizedResult> | MinimizedResult;
 type MinimizeFunctionHelpers = {
   supportsWorkerThreads?: (() => boolean | undefined) | undefined;
 };
@@ -222,8 +222,8 @@ type BasePluginOptions = {
   parallel?: Parallel;
 };
 type MinimizerWorker<T> = JestWorker & {
-  transform: (options: string) => InternalResult;
-  minify: (options: InternalOptions<T>) => InternalResult;
+  transform: (options: string) => Promise<InternalResult>;
+  minify: (options: InternalOptions<T>) => Promise<InternalResult>;
 };
 type ProcessOptionsExtender =
   | ProcessOptions
diff --git a/types/utils.d.ts b/types/utils.d.ts
index 9549d12..e1ea35c 100644
--- a/types/utils.d.ts
+++ b/types/utils.d.ts
@@ -25,98 +25,98 @@ export function throttleAll<T>(limit: number, tasks: Task<T>[]): Promise<T[]>;
 export function memoize<T>(fn: (() => any) | undefined): () => T;
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function cssnanoMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions?: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace cssnanoMinify {
   function supportsWorkerThreads(): boolean;
 }
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function cssoMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace cssoMinify {
   function supportsWorkerThreads(): boolean;
 }
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function cleanCssMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace cleanCssMinify {
   function supportsWorkerThreads(): boolean;
 }
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function esbuildMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace esbuildMinify {
   function supportsWorkerThreads(): boolean;
 }
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function parcelCssMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace parcelCssMinify {
   function supportsWorkerThreads(): boolean;
 }
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function lightningCssMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace lightningCssMinify {
   function supportsWorkerThreads(): boolean;
 }
 /**
  * @param {Input} input
- * @param {RawSourceMap | undefined} sourceMap
- * @param {CustomOptions} minimizerOptions
+ * @param {RawSourceMap} [sourceMap]
+ * @param {CustomOptions} [minimizerOptions]
  * @return {Promise<MinimizedResult>}
  */
 export function swcMinify(
   input: Input,
-  sourceMap: RawSourceMap | undefined,
-  minimizerOptions: CustomOptions,
+  sourceMap?: import("@jridgewell/trace-mapping").EncodedSourceMap | undefined,
+  minimizerOptions?: import("./index.js").CustomOptions | undefined,
 ): Promise<MinimizedResult>;
 export namespace swcMinify {
   function supportsWorkerThreads(): boolean;