diff --git a/news/125.breaking b/news/125.breaking
new file mode 100644
index 00000000..8336c5b1
--- /dev/null
+++ b/news/125.breaking
@@ -0,0 +1,3 @@
+Remove use of portal_properties.
+Theoretically we were using this for sorting the navigation portlet.
+[maurits]
diff --git a/plone/app/portlets/portlets/navigation.py b/plone/app/portlets/portlets/navigation.py
index f1fc0819..d517562e 100644
--- a/plone/app/portlets/portlets/navigation.py
+++ b/plone/app/portlets/portlets/navigation.py
@@ -406,9 +406,6 @@ def __init__(self, context, portlet):
         self.context = context
         self.portlet = portlet
 
-        portal_properties = getToolByName(context, "portal_properties")
-        navtree_properties = getattr(portal_properties, "navtree_properties")
-
         # Acquire a custom nav query if available
         customQuery = getattr(context, "getCustomNavQuery", None)
         if customQuery is not None and safe_callable(customQuery):
@@ -443,14 +440,6 @@ def __init__(self, context, portlet):
         # Only list the applicable types
         query["portal_type"] = typesToList(context)
 
-        # Apply the desired sort
-        sortAttribute = navtree_properties.getProperty("sortAttribute", None)
-        if sortAttribute is not None:
-            query["sort_on"] = sortAttribute
-            sortOrder = navtree_properties.getProperty("sortOrder", None)
-            if sortOrder is not None:
-                query["sort_order"] = sortOrder
-
         # Filter on workflow states, if enabled
         registry = getUtility(IRegistry)
         navigation_settings = registry.forInterface(INavigationSchema, prefix="plone")
diff --git a/setup.py b/setup.py
index 372d6fd4..d6af0679 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 from setuptools import setup
 
 
-version = "5.0.8.dev0"
+version = "6.0.0.dev0"
 
 setup(
     name="plone.app.portlets",