diff --git a/pyproject.toml b/pyproject.toml
index f34f95c6..d1ec56d7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
   "pydantic~=1.10",
   "jsonschema~=4.0",
   "PyYAML~=6.0",
-  "more-itertools~=8.0",
+  "more-itertools>=8.0,<11.0",
   "Jinja2~=3.0",
   "click>=7.0,<9.0",
   "python-dateutil~=2.0",