diff --git a/docs/x509.rst b/docs/x509.rst
index f94f50e..a3cf7e2 100644
--- a/docs/x509.rst
+++ b/docs/x509.rst
@@ -328,6 +328,8 @@
 
     .. method:: public_bytes(encoding)
 
+        .. versionadded:: 1.0
+
         :param encoding: The
             :class:`~cryptography.hazmat.primitives.serialization.Encoding`
             that will be used to serialize the certificate.
@@ -435,6 +437,8 @@
 
     .. method:: public_bytes(encoding)
 
+        .. versionadded:: 1.0
+
         :param encoding: The
             :class:`~cryptography.hazmat.primitives.serialization.Encoding`
             that will be used to serialize the certificate request.