Use HTTPS urls for a few more websites (#3416)
diff --git a/docs/hazmat/primitives/cryptographic-hashes.rst b/docs/hazmat/primitives/cryptographic-hashes.rst
index fd5f35d..34d88bc 100644
--- a/docs/hazmat/primitives/cryptographic-hashes.rst
+++ b/docs/hazmat/primitives/cryptographic-hashes.rst
@@ -224,6 +224,6 @@
:return: A :class:`HashContext` that is a copy of the current context.
-.. _`Lifetimes of cryptographic hash functions`: http://valerieaurora.org/hash.html
+.. _`Lifetimes of cryptographic hash functions`: https://valerieaurora.org/hash.html
.. _`BLAKE2`: https://blake2.net
.. _`length-extension attacks`: https://en.wikipedia.org/wiki/Length_extension_attack