diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 26d8289..646da8b 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -87,8 +87,8 @@ documentation. Maintain it along with code and documentation.
 .. _`bugtracker`: 
    https://github.com/benoitbryon/django-downloadview/issues
 .. _`rebase`: http://git-scm.com/book/en/Git-Branching-Rebasing
-.. _`merge-based rebase`: http://tech.novapost.fr/psycho-rebasing-en.html
+.. _`merge-based rebase`: https://tech.people-doc.com/psycho-rebasing.html
 .. _`pip`: https://pypi.python.org/pypi/pip/
-.. _`tox`: http://tox.testrun.org
+.. _`tox`: https://tox.readthedocs.io/
 .. _`Sphinx`: https://pypi.python.org/pypi/Sphinx/
 .. _`zest.releaser`: https://pypi.python.org/pypi/zest.releaser/
diff --git a/docs/files.txt b/docs/files.txt
index ac451ad..bd82b30 100644
--- a/docs/files.txt
+++ b/docs/files.txt
@@ -127,4 +127,4 @@ TextIteratorIO
 .. target-notes::
 
 .. _`Django itself provides some file wrappers`:
-   https://docs.djangoproject.com/en/1.9/ref/files/file/
+   https://docs.djangoproject.com/en/3.0/ref/files/file/