diff --git a/pyencrypt/encrypt.py b/pyencrypt/encrypt.py
index 6a4a904..954b3d1 100644
--- a/pyencrypt/encrypt.py
+++ b/pyencrypt/encrypt.py
@@ -1,8 +1,9 @@
 import os
 import re
-import subprocess
 from pathlib import Path
 
+import python_minifier
+
 from pyencrypt.aes import aes_encrypt
 from pyencrypt.generate import generate_rsa_number
 from pyencrypt.ntt import ntt
@@ -73,28 +74,17 @@ def generate_so_file(cipher_key: str, d: int, n: int, base_dir: Path = None, lic
     loader_file_path.touch(exist_ok=True)
 
     decrypt_source = '\n'.join(decrypt_source_ls)
-    loader_file_path.write_text(f"{decrypt_source}\n{loader_source}")
 
     # Origin file
     loader_origin_file_path = temp_dir / 'loader_origin.py'
     loader_origin_file_path.touch(exist_ok=True)
     loader_origin_file_path.write_text(f"{decrypt_source}\n{loader_source}")
 
-    args = [
-        'pyminifier',
-        '--obfuscate-classes',
-        '--obfuscate-import-methods',
-        '--replacement-length',
-        '20',
-        '-o',
-        loader_file_path.as_posix(),
-        loader_file_path.as_posix(),
-    ]
-    ret = subprocess.run(args, shell=False, encoding='utf-8')
-    if ret.returncode == 0:
-        pass
-
-    from setuptools import setup
+    loader_file_path.write_text(
+        python_minifier.minify(loader_origin_file_path.read_text())
+    )
+
+    from setuptools import setup  # isort:skip
     from Cython.Build import cythonize
     from Cython.Distutils import build_ext
     setup(
diff --git a/requirement.txt b/requirement.txt
index ced629c..112162c 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -1,4 +1,4 @@
 click==8.0.3
 Cython==0.29.24
 pycryptodome==3.14.1
-pyminifier==2.1
+python-minifier==2.9.0
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
index 16877d3..7db65bc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,7 +31,7 @@ keywords = python-encrypt, import-hook
 install_requires = 
     Cython >= 0.29.24
     pycryptodome >= 3.14.1
-    pyminifier >= 2.1
+    python-minifier >= 2.6.0
     click
 python_requires = >=3.6
 packages = find: