diff --git a/pyproject.toml b/pyproject.toml
index 9300763..634c01f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ dependencies = [
     "openpyxl",
     "pandas",
     "patito",
+    "polars==1.32.0",
     "pyarrow",
     "pydantic[email]",
     "pydantic-settings",
@@ -43,12 +44,12 @@ local = [
     "ipywidgets"
 ]
 dagster = [
-    "dagster",
+    "dagster==1.11.4",
     "dagster-graphql",
     "dagster-postgres",
     "dagster-docker",
     "dagster-aws",
-    "dagster-polars[patito]",
+    "dagster-polars[patito]==0.27.4",
     "dagster-duckdb",
     "dagster-duckdb-pandas",
     "dagit"