typo fix
diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst
index 4d164dc..c7d45c7 100644
--- a/docs/x509/reference.rst
+++ b/docs/x509/reference.rst
@@ -438,9 +438,9 @@
The extensions encoded in the certificate signing request.
:raises cryptography.x509.DuplicateExtension: If more than one
- extension of the same type is found within the certificate siging request.
+ extension of the same type is found within the certificate signing request.
- :raises cryptography.x509.UnsupportedExtension: If the certificate siging request
+ :raises cryptography.x509.UnsupportedExtension: If the certificate signing request
contains an extension that is not supported.
:raises cryptography.x509.UnsupportedGeneralNameType: If an extension