doc/limitations.rst | 1 +

diff --git a/doc/limitations.rst b/doc/limitations.rst
index 58ae892bb1161dd66414c737257b70aca9028beeb9cc390289d7f6daed7d7fd6..1d69c82dc3cd2b1a1515b239869481b3e5a6afce43f7a4a9b513fa0e331f3c21 100644
--- a/doc/limitations.rst
+++ b/doc/limitations.rst
@@ -7,6 +7,7 @@ * Strings (except :py:class:`pyderasn.NumericString` and
   :py:class:`pyderasn.PrintableString`) are not validated
   in any way, except just trying to be decoded in ``ascii``,
   ``iso-8859-1``, ``utf-8/16/32`` correspondingly
+* :py:class:`pyderasn.GeneralizedTime` does not support zero year
 * :py:class:`pyderasn.UTCTime` and :py:class:`pyderasn.GeneralizedTime`
   support only DER-encoding
 * No REAL, RELATIVE OID, EXTERNAL, INSTANCE OF, EMBEDDED PDV, CHARACTER STRING