diff --git a/pyproject.toml b/pyproject.toml
index 09943d8a9cd..2810b4db894 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,6 +53,7 @@ dependencies=[
     "packaging",
     "pandas",
     "pluggy>=1.3.0",
+    "polars",
     "psutil",
     "pyarrow",  # extra dependency for pandas (parquet)
     "pydantic > 2",