Standardise on sentence case for titles
diff --git a/docs/hazmat/primitives/cryptographic-hashes.rst b/docs/hazmat/primitives/cryptographic-hashes.rst
index b7eee2f..c318fee 100644
--- a/docs/hazmat/primitives/cryptographic-hashes.rst
+++ b/docs/hazmat/primitives/cryptographic-hashes.rst
@@ -1,6 +1,6 @@
.. hazmat::
-Message Digests
+Message digests
===============
.. currentmodule:: cryptography.hazmat.primitives.hashes
@@ -90,7 +90,7 @@
SHA-1 is a cryptographic hash function standardized by NIST. It produces an
160-bit message digest.
-SHA-2 Family
+SHA-2 family
~~~~~~~~~~~~
.. class:: SHA224()