diff --git a/tox.ini b/tox.ini
index 7b751a0f380..6a1921a1428 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,12 +33,14 @@ deps =
     coverage
     psycopg2-binary
     pymssql<3.0
+    https://github.com/ales-erjavec/orange-canvas-core/archive/refs/heads/remove-pkg-resources.zip#egg=orange-canvas-core
+    https://github.com/ales-erjavec/orange-widget-base/archive/refs/heads/remove-pkg-resources.zip#egg=orange-widget-base
     latest: https://github.com/pyqtgraph/pyqtgraph/archive/refs/heads/master.zip#egg=pyqtgraph
-    latest: https://github.com/biolab/orange-canvas-core/archive/refs/heads/master.zip#egg=orange-canvas-core
-    latest: https://github.com/biolab/orange-widget-base/archive/refs/heads/master.zip#egg=orange-widget-base
+    latest: https://github.com/ales-erjavec/orange-canvas-core/archive/refs/heads/remove-pkg-resources.zip#egg=orange-canvas-core
+    latest: https://github.com/ales-erjavec/orange-widget-base/archive/refs/heads/remove-pkg-resources.zip#egg=orange-widget-base
     # GUI requirements
-    oldest: orange-canvas-core==0.1.30
-    oldest: orange-widget-base==4.22.0
+    oldest: https://github.com/ales-erjavec/orange-canvas-core/archive/refs/heads/remove-pkg-resources.zip#egg=orange-canvas-core
+    oldest: https://github.com/ales-erjavec/orange-widget-base/archive/refs/heads/remove-pkg-resources.zip#egg=orange-widget-base
     oldest: AnyQt==0.2.0
     oldest: matplotlib==3.2.0
     oldest: pygments==2.8.0