diff --git a/setup.py b/setup.py
index ba992c1..7e6d8ab 100755
--- a/setup.py
+++ b/setup.py
@@ -5,9 +5,9 @@ setup(
     version='0.0.1',
     packages=find_packages(include=['adaptive_threshold', 'adaptive_threshold.*']),
     install_requires=[
-        'opencv-python',
-        'numpy',
-        'docopt',
+        'opencv-python==4.6.0.66',
+        'numpy==1.24.2',
+        'docopt==0.6.2',
     ],
     entry_points={
       'console_scripts': ['adaptive_threshold=adaptive_threshold:main']