All caps
diff --git a/docs/primitives/symmetric-encryption.rst b/docs/primitives/symmetric-encryption.rst
index 7c77f29..182c9e4 100644
--- a/docs/primitives/symmetric-encryption.rst
+++ b/docs/primitives/symmetric-encryption.rst
@@ -34,7 +34,7 @@
.. class:: cryptography.primitives.aes.AES(key)
- AES (Advanced encryption standard) is a block cipher standardized by NIST.
+ AES (Advanced Encryption Standard) is a block cipher standardized by NIST.
AES is both fast, and cryptographically strong. It is a good default
choice for encryption.