diff --git a/envs/environment.yaml b/envs/environment.yaml
index 895b271a..d92eb696 100644
--- a/envs/environment.yaml
+++ b/envs/environment.yaml
@@ -36,7 +36,7 @@ dependencies:
 - networkx
 - scipy
 - shapely>=2.0
-- scipopt
+- pyscipopt
 - matplotlib
 - proj
 - fiona
diff --git a/scripts/cluster_network.py b/scripts/cluster_network.py
index b63e7f89..2c69b9af 100644
--- a/scripts/cluster_network.py
+++ b/scripts/cluster_network.py
@@ -364,7 +364,7 @@ def busmap_for_n_clusters(
 
     return (
         n.buses.groupby(["country", "sub_network"], group_keys=False)
-        .apply(busmap_for_country)
+        .apply(busmap_for_country, include_groups=False)
         .squeeze()
         .rename("busmap")
     )