diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2a1b721..f90a20d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -121,7 +121,7 @@ And we are always happy to help you finalizing incomplete pull requests.
 
 ### Documentation Styleguide
 
-* Follow the [numpy documentation guidelines](https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt).
+* Follow the [numpy documentation guidelines](https://numpydoc.readthedocs.io/en/latest/format.html#docstring-standard).
 * Use [reStructuredText](http://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html).
 * Try to not repeat yourself and make use of the `psyplot.docstring.docstrings`
 
diff --git a/docs/contribute.rst b/docs/contribute.rst
index 09ba60e..1c9aada 100644
--- a/docs/contribute.rst
+++ b/docs/contribute.rst
@@ -204,7 +204,7 @@ Documentation Styleguide
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
 -  Follow the `numpy documentation
-   guidelines <https://github.com/numpy/numpy/blob/main/doc/HOWTO_DOCUMENT.rst.txt>`__.
+   guidelines <https://numpydoc.readthedocs.io/en/latest/format.html#docstring-standard>`__.
 -  Use
    `reStructuredText <http://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html>`__.
 -  Try to not repeat yourself and make use of the