diff --git a/setup.py b/setup.py
index ac5a296..70db9ff 100644
--- a/setup.py
+++ b/setup.py
@@ -7,9 +7,9 @@ setup(name='structure_assignment',
       author='Cyprian Laskowski',
       author_email='cyp@cjvt.si',
       packages=['structure_assignment'],
-      install_requires=['lxml',
-                        'classla',
-                        'conversion_utils @ git+https://gitea.cjvt.si/generic/conversion_utils.git',
+      install_requires=['lxml>=4.9',
+                        'classla>=2.1',
+                        'conversion_utils @ git+https://gitea.cjvt.si/generic/conversion_utils@89be60310380339f97ccd2feee65d5d69859e7f9',
                         'cordex @ git+https://github.com/clarinsi/cordex.git@structure_assignment',
       ],
       zip_safe=True)