diff --git a/pyproject.toml b/pyproject.toml
index e161ac245..057655c29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ dependencies = [
   "pyodbc~=5.2.0",
   "SQLAlchemy~=2.0.40",
   "pygls~=2.0.0a2",
-  "duckdb~=1.2.2",
+  "duckdb>=1.2.2,<1.5.0",
   "requests>=2.28.1,<3"  # Matches databricks-sdk (and 'types-requests' below), to avoid conflicts.
 ]