diff --git a/package.json b/package.json
index a17f208..80f43da 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,6 @@
 	},
 	"dependencies": {
 		"@esbuild-kit/core-utils": "^1.2.1",
-		"es-module-lexer": "^0.10.5",
 		"get-tsconfig": "^3.0.1"
 	},
 	"devDependencies": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 45275e1..a9feb44 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -5,7 +5,6 @@ specifiers:
   '@pvtnbr/eslint-config': ^0.22.0
   '@types/node': ^17.0.33
   '@types/semver': ^7.3.9
-  es-module-lexer: ^0.10.5
   eslint: ^8.15.0
   execa: ^6.1.0
   get-node: ^13.0.1
@@ -18,7 +17,6 @@ specifiers:
 
 dependencies:
   '@esbuild-kit/core-utils': 1.2.1
-  es-module-lexer: 0.10.5
   get-tsconfig: 3.0.1
 
 devDependencies:
@@ -940,10 +938,6 @@ packages:
       unbox-primitive: 1.0.2
     dev: true
 
-  /es-module-lexer/0.10.5:
-    resolution: {integrity: sha512-+7IwY/kiGAacQfY+YBhKMvEmyAJnw5grTUgjG85Pe7vcUI/6b7pZjZG8nQ7+48YhzEAEqrEgD2dCz/JIK+AYvw==}
-    dev: false
-
   /es-shim-unscopables/1.0.0:
     resolution: {integrity: sha512-Jm6GPcCdC30eMLbZ2x8z2WuRwAws3zTBBKuusffYVUrNj/GVSUAZ+xKMaUpfNDR5IbyNA5LJbaecoUVbmUcB1w==}
     dependencies:
diff --git a/src/utils.ts b/src/utils.ts
index 88e3983..ce299ea 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,4 @@
 import path from 'path';
-import { init, parse } from 'es-module-lexer';
 
 export const tsExtensionsPattern = /\.([cm]?ts|[tj]sx)$/;
 
@@ -24,31 +23,3 @@ export type ModuleFormat =
 	| 'wasm';
 
 export type MaybePromise<T> = T | Promise<T>;
-
-let isLexerReady = false;
-
-// eslint-disable-next-line promise/catch-or-return
-init.then(() => {
-	isLexerReady = true;
-});
-
-/**
- * isESM - determined by whether the module
- * uses imports or exports
- */
-const _isEsm = (source: string) => {
-	const [imports, exports] = parse(source);
-
-	return (
-		imports.length > 0
-		|| exports.length > 0
-	);
-};
-
-export function isEsm(source: string) {
-	if (!isLexerReady) {
-		return init.then(() => _isEsm(source));
-	}
-
-	return _isEsm(source);
-}