diff --git a/envs/environment.yaml b/envs/environment.yaml
index e52cf4348..631958eb9 100644
--- a/envs/environment.yaml
+++ b/envs/environment.yaml
@@ -11,7 +11,7 @@ dependencies:
 - pip
 
 # Inhouse packages
-- pypsa>=0.31
+- pypsa>=0.32
 - atlite>=0.2.9
 - linopy
 - powerplantmatching>=0.5.15,<0.6
diff --git a/scripts/make_summary.py b/scripts/make_summary.py
index 10a5ccefd..51698c787 100644
--- a/scripts/make_summary.py
+++ b/scripts/make_summary.py
@@ -540,14 +540,12 @@ def calculate_prices(n, label, prices):
 
 
 def calculate_weighted_prices(n, label, weighted_prices):
-
     carriers = n.buses.carrier.unique()
 
     for carrier in carriers:
-        grouper = n.statistics.groupers.get_bus_and_carrier
         load = (
             n.statistics.withdrawal(
-                groupby=grouper,
+                groupby=pypsa.statistics.groupers["bus", "carrier"],
                 aggregate_time=False,
                 nice_names=False,
                 bus_carrier=carrier,
diff --git a/scripts/prepare_sector_network.py b/scripts/prepare_sector_network.py
index 1709e8201..7332c5947 100755
--- a/scripts/prepare_sector_network.py
+++ b/scripts/prepare_sector_network.py
@@ -2175,7 +2175,7 @@ def add_heat(
                 # add resource
                 heat_carrier = f"{heat_system} {heat_source} heat"
                 n.add("Carrier", heat_carrier)
-                n.madd(
+                n.add(
                     "Bus",
                     nodes,
                     suffix=f" {heat_carrier}",
@@ -2196,7 +2196,7 @@ def add_heat(
                 else:
                     capital_cost = 0.0
                     lifetime = np.inf
-                n.madd(
+                n.add(
                     "Generator",
                     nodes,
                     suffix=f" {heat_carrier}",
@@ -2209,7 +2209,7 @@ def add_heat(
                 )
 
                 # add heat pump converting source heat + electricity to urban central heat
-                n.madd(
+                n.add(
                     "Link",
                     nodes,
                     suffix=f" {heat_system} {heat_source} heat pump",
@@ -2237,7 +2237,7 @@ def add_heat(
                         .reindex(index=n.snapshots)
                     )
                     # add link for direct usage of heat source when source temperature exceeds forward temperature
-                    n.madd(
+                    n.add(
                         "Link",
                         nodes,
                         suffix=f" {heat_system} {heat_source} heat direct utilisation",
@@ -2248,7 +2248,7 @@ def add_heat(
                         p_nom_extendable=True,
                     )
             else:
-                n.madd(
+                n.add(
                     "Link",
                     nodes,
                     suffix=f" {heat_system} {heat_source} heat pump",