diff --git a/setup.py b/setup.py
index 6cca2ac3..6980e329 100644
--- a/setup.py
+++ b/setup.py
@@ -26,6 +26,8 @@
 if sys.version_info[0] < 3:
     install_requires.append("beautifulsoup4 < 4.10")
     install_requires.append("plone.restapi < 8.0.0")
+    # There is a py2-imcompatibility in plone.rest 3.0.1
+    install_requires.append("plone.rest < 3.0.1")
     # plone.restapi depends on plone.schema, which depends on jsonschema,
     # which has a Py3-only release since September 2021.
     install_requires.append("jsonschema < 4")