update docs
diff --git a/docs/x509.rst b/docs/x509.rst
index 525b869..19a62be 100644
--- a/docs/x509.rst
+++ b/docs/x509.rst
@@ -193,7 +193,7 @@
 
     .. attribute:: value
 
-        :type: :class:`str`
+        :type: :term:`text`
 
         The value of the attribute.