diff --git a/pyproject.toml b/pyproject.toml
index 378d3ffe43..161db263c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ requires-python = ">= 3.9"
 dependencies = [
     "click",
     "croniter",
-    "duckdb>=0.10.0,!=0.10.3",
+    "duckdb>=0.10.0,!=0.10.3,<2",
     "dateparser<=1.2.1",
     "humanize",
     "hyperscript>=0.1.0",
@@ -121,7 +121,7 @@ fabric = ["pyodbc>=5.0.0"]
 fabric-mssql-python = ["mssql-python>=1.1.0;python_version>=\"3.10\""]
 gcppostgres = ["cloud-sql-python-connector[pg8000]>=1.8.0"]
 github = ["PyGithub>=2.6.0"]
-motherduck = ["duckdb>=1.3.2"]
+motherduck = ["duckdb>=1.3.2,<2"]
 mssql = ["pymssql"]
 mssql-odbc = ["pyodbc>=5.0.0"]
 mssql-python = ["mssql-python>=1.1.0;python_version>=\"3.10\""]