diff --git a/pyproject.toml b/pyproject.toml
index ec9b794b..02285df5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,7 +70,8 @@ spatial = [
     "cell2location",
     "tangram-sc", 
     "spatialdata==0.2.6", 
-    "spatialdata-io==0.1.6"
+    "spatialdata-io==0.1.6", 
+    "dask==2024.12.1"
 ]
 
 refmap_old = [