diff --git a/plugins/yjs/pyproject.toml b/plugins/yjs/pyproject.toml
index 94ac7f81..4cdb1495 100644
--- a/plugins/yjs/pyproject.toml
+++ b/plugins/yjs/pyproject.toml
@@ -9,7 +9,7 @@ keywords = [ "jupyter", "server", "fastapi", "plugins" ]
 requires-python = ">=3.8"
 dependencies = [
     "importlib_metadata >=3.6; python_version<'3.10'",
-    "pycrdt >=0.8.16,<0.9.0",
+    "pycrdt >=0.9.0,<0.10.0",
     "jupyverse-api >=0.1.2,<1",
 ]
 dynamic = [ "version",]