diff --git a/setup.py b/setup.py
index 3a6a854d..16bf8d31 100644
--- a/setup.py
+++ b/setup.py
@@ -106,7 +106,7 @@ def get_version_string():
     "etesync>=0.12.1",
     "etebase>=0.30.0",
     "msgpack>=1.0.0",
-    "Radicale>=3.0.3,<3.3.0",
+    "Radicale>=3.0.3,<4",
     "Flask>=2.3.0",
     "Flask-WTF>=1.2.0,<2.0.0",
     "requests[socks]>=2.21",