diff --git a/.gitignore b/.gitignore
index 824e6c5..027be60 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,7 +29,6 @@ MANIFEST
 #  Usually these files are written by a python script from a template
 #  before PyInstaller builds the exe, so as to inject date/other infos into it.
 *.manifest
-*.spec
 
 # Installer logs
 pip-log.txt
diff --git a/main.spec b/main.spec
new file mode 100644
index 0000000..d43247d
--- /dev/null
+++ b/main.spec
@@ -0,0 +1,86 @@
+# -*- mode: python ; coding: utf-8 -*-
+# vi: ft=python
+
+
+from argparse import ArgumentParser
+import sys
+from PyInstaller.building.api import COLLECT, EXE, PYZ
+from PyInstaller.building.build_main import Analysis
+from PyInstaller.building.osx import BUNDLE
+
+
+parser = ArgumentParser()
+parser.add_argument('--portable', action='store_true')
+options = parser.parse_args()
+
+
+name = 'DonkeyDoc' if sys.platform == 'win32' else 'donkeydoc'
+icon = None
+if sys.platform == 'win32':
+    icon = 'docs/logo.ico'
+elif sys.platform == 'darwin':
+    icon = 'docs/logo.icns'
+
+
+a = Analysis(
+    ['main.py'],
+    pathex=[],
+    binaries=[],
+    datas=[('docs', './docs'), ('app', './app'), ('lib', './lib')],
+    hiddenimports=[],
+    hookspath=[],
+    hooksconfig={},
+    excludes=[],
+    runtime_hooks=[],
+    noarchive=False,
+    optimize=0,
+)
+
+pyz = PYZ(a.pure)
+
+include = [a.scripts]
+if options.portable:
+    include += (a.binaries, a.datas)
+exe = EXE(
+    pyz,
+    *include,
+    [],
+    bootloader_ignore_signals=False,
+    console=False,
+    hide_console='hide-early',
+    disable_windowed_traceback=False,
+    debug=False,
+    name=name,
+    exclude_binaries=not options.portable,
+    icon=icon,
+    argv_emulation=False,
+    target_arch=None,
+    codesign_identity=None,
+    entitlements_file=None,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+    runtime_tmpdir=None
+)
+
+coll = None if options.portable else COLLECT(
+    exe,
+    a.binaries,
+    a.datas,
+    name=name,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+)
+
+app = BUNDLE(
+    exe if coll is None else coll,
+    name='DonkeyDoc.app',
+    icon=icon,
+    bundle_identifier='com.github.donkeydocdev',
+    version='0.0.0',
+    info_plist={
+        'NSAppleScriptEnabled': False,
+        'NSPrincipalClass': 'NSApplication',
+    }
+)
\ No newline at end of file