fix links

Author: Onur R. Bingol

README.rst

@@ -59,10 +59,11 @@ The `following article <https://doi.org/10.1016/j.softx.2018.12.005>`_ outlines
 License
 =======
 
-NURBS-Python (geomdl) is licensed under the terms of `MIT License <LICENSE>`_ and it contains the following modules:
+NURBS-Python (geomdl) is licensed under the terms of the `MIT License <LICENSE>`_.
+It also contains the following modules:
 
-* ``six`` is licensed under the terms of `MIT License <https://github.com/benjaminp/six/blob/1.12.0/LICENSE>`_
-* ``backports.functools_lru_cache`` is licensed under the terms of `MIT License <https://github.com/jaraco/backports.functools_lru_cache/blob/1.5/LICENSE>`_
+* ``six`` is licensed under the terms of the MIT License.
+* ``backports.functools_lru_cache`` is licensed under the terms of the MIT License.
 
 .. |RTD| image:: https://readthedocs.org/projects/nurbs-python/badge/?version=5.x
 .. _RTD: https://nurbs-python.readthedocs.io/en/5.x/?badge=5.x