diff --git a/pyproject.toml b/pyproject.toml
index 4775befe..47af63ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dependencies = [
   "pydantic~=2.0",
   "pylsp-bec~=1.2",
   "pyqtgraph==0.14.0",
-  "python-slugify~=8.0",
+  "python-slugify>=8,<10",
   "qtconsole~=5.5, >=5.5.1",       # needed for jupyter console
   "qtmonaco~=0.8, >=0.8.1",
   "qtpy~=2.4",