diff --git a/src/cli/JavaScriptObfuscatorCLI.ts b/src/cli/JavaScriptObfuscatorCLI.ts
index 2a10bd11..8a7621d4 100644
--- a/src/cli/JavaScriptObfuscatorCLI.ts
+++ b/src/cli/JavaScriptObfuscatorCLI.ts
@@ -40,7 +40,9 @@ export class JavaScriptObfuscatorCLI implements IInitializable {
      * @type {string[]}
      */
     public static readonly availableInputExtensions: string[] = [
-        '.js'
+        '.js',
+        '.mjs',
+        '.cjs'
     ];
 
     /**