diff --git a/doc/guide/classify.xml b/doc/guide/classify.xml
index ce4d37f674..8ee002cbfa 100644
--- a/doc/guide/classify.xml
+++ b/doc/guide/classify.xml
@@ -1121,9 +1121,9 @@ concatenation of the strings</entry></row>
      </para>
 
      <para>
-     In order to understand the logging statements one must understand a
-     bit about how expressions are evaluated, for a more complete description
-     refer to the design document at <uri xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://oldkea.isc.org/wiki/KeaDesigns">http://oldkea.isc.org/wiki/KeaDesigns</uri>.
+     In order to understand the logging statements, one must understand a
+     bit about how expressions are evaluated; for a more complete description
+     refer to the design document at <uri xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://gitlab.isc.org/isc-projects/kea/wikis/design%20documents">https://gitlab.isc.org/isc-projects/kea/wikis/design%20documents</uri>.
      In brief there are two structures used during the evaluation of an expression:
      a list of tokens which represent the expressions and a value stack which
      represents the values being manipulated.