diff --git a/tox.ini b/tox.ini
index 4b159aed..57d10d04 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,6 +29,7 @@ deps =
     oldest: numpy==1.19.5
     oldest: scipy==1.9.0
     oldest: anyqt==0.1.0
+    oldest: openai==1.0.0
     latest: https://github.com/biolab/orange3/archive/refs/heads/master.zip#egg=orange3
     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