diff --git a/build.bat b/build.bat
deleted file mode 100644
index 39c35df..0000000
--- a/build.bat
+++ /dev/null
@@ -1,2 +0,0 @@
-@echo off
-pyinstaller build.spec --upx-dir=upx\
diff --git a/build.spec b/build.spec
deleted file mode 100644
index e190e5b..0000000
--- a/build.spec
+++ /dev/null
@@ -1,40 +0,0 @@
-# -*- mode: python ; coding: utf-8 -*-
-
-
-block_cipher = None
-
-
-a = Analysis(['main.py'],
-             pathex=[],
-             binaries=[],
-             datas=[],
-             hiddenimports=[],
-             hookspath=[],
-             hooksconfig={},
-             runtime_hooks=[],
-             excludes=[],
-             win_no_prefer_redirects=False,
-             win_private_assemblies=False,
-             cipher=block_cipher,
-             noarchive=False)
-pyz = PYZ(a.pure, a.zipped_data,
-             cipher=block_cipher)
-
-exe = EXE(pyz,
-          a.scripts,
-          a.binaries,
-          a.zipfiles,
-          a.datas,  
-          [],
-          name='Show computer boot up time',
-          debug=False,
-          bootloader_ignore_signals=False,
-          strip=False,
-          upx=True,
-          upx_exclude=[],
-          runtime_tmpdir=None,
-          console=True,
-          disable_windowed_traceback=False,
-          target_arch=None,
-          codesign_identity=None,
-          entitlements_file=None)
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..c855d26
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+pyinstaller==4.10
\ No newline at end of file