diff --git a/build.py b/build.py
index eb9237e..b2dcd21 100644
--- a/build.py
+++ b/build.py
@@ -18,7 +18,7 @@
     # Check upx
     upx = ''
     if sys.platform == 'win32' and sys_arch == 64:
-        upx = '--upx-dir build/upx_64'
+        upx = '--upx-dir specs'
     pyinstaller = f'python -m PyInstaller' if sys.platform == 'win32' else 'pyinstaller'
 
     # os.system(f'{pyinstaller} specs/PyDetex_Win.spec --noconfirm {upx}')
diff --git a/specs/upx.exe b/specs/upx.exe
new file mode 100644
index 0000000..f38f6b9
Binary files /dev/null and b/specs/upx.exe differ