update the language
diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst
index f53eae0..4f4ce4f 100644
--- a/docs/x509/reference.rst
+++ b/docs/x509/reference.rst
@@ -1699,11 +1699,10 @@
.. versionadded:: 1.2
- The CRL number is a non-critical CRL extension that conveys a
- monotonically increasing sequence number for a given CRL scope and
- CRL issuer. This extension allows users to easily determine when a
- particular CRL supersedes another CRL. :rfc:`5280` requires that this
- extension be present in conforming CRLs.
+ The CRL number is a CRL extension that conveys a monotonically increasing
+ sequence number for a given CRL scope and CRL issuer. This extension allows
+ users to easily determine when a particular CRL supersedes another CRL.
+ :rfc:`5280` requires that this extension be present in conforming CRLs.
.. attribute:: oid