diff --git a/docs/changes.rst b/docs/changes.rst
index 5758119..186d3c4 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -7,6 +7,8 @@
 - Completely drop ``z3c.autoinclude`` as all packages in groktoolkit no longer
   use it.
 
+- Update to zopetoolkit version 3.3.
+
 
 5.3 (unreleased)
 ----------------
diff --git a/grok.cfg b/grok.cfg
index ff7208f..e07adbb 100644
--- a/grok.cfg
+++ b/grok.cfg
@@ -4,7 +4,7 @@
 
 [buildout]
 extends =
-  https://zopefoundation.github.io/zopetoolkit/releases/3.2/ztk-versions.cfg
+  https://zopefoundation.github.io/zopetoolkit/releases/3.3/ztk-versions.cfg
   grok-versions.cfg
   grok-sources.cfg