diff --git a/config.default.yaml b/config.default.yaml
index 20c05727..5f2e1c6c 100755
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -86,6 +86,7 @@ electricity:
 
 atlite:
   nprocesses: 4
+  show_progress: false # false saves time
   cutouts:
     # use 'base' to determine geographical bounds and time span from config
     # base:
diff --git a/config.tutorial.yaml b/config.tutorial.yaml
index a3ffc2a9..4c093a3c 100755
--- a/config.tutorial.yaml
+++ b/config.tutorial.yaml
@@ -56,6 +56,7 @@ electricity:
 
 atlite:
   nprocesses: 4
+  show_progress: false # false saves time
   cutouts:
     be-03-2013-era5:
       module: era5
diff --git a/scripts/simplify_network.py b/scripts/simplify_network.py
index 5b8c8f49..42f7daac 100644
--- a/scripts/simplify_network.py
+++ b/scripts/simplify_network.py
@@ -217,7 +217,7 @@ def _adjust_capital_costs_using_connection_costs(n, connection_costs_to_bus, out
                     tech,
                     ", ".join(
                         "{:.0f} Eur/MW/a for `{}`".format(d, b)
-                        for b, d in costs.iteritems()
+                        for b, d in costs.items()
                     ),
                 )
             )
@@ -369,7 +369,7 @@ def simplify_links(n, costs, config, output, aggregation_strategies=dict()):
             n.mremove("Link", all_links)
 
             static_attrs = n.components["Link"]["attrs"].loc[lambda df: df.static]
-            for attr, default in static_attrs.default.iteritems():
+            for attr, default in static_attrs.default.items():
                 params.setdefault(attr, default)
             n.links.loc[name] = pd.Series(params)
 
diff --git a/test/config.test1.yaml b/test/config.test1.yaml
index 15dc8e6e..7c9b0896 100755
--- a/test/config.test1.yaml
+++ b/test/config.test1.yaml
@@ -54,6 +54,7 @@ electricity:
 
 atlite:
   nprocesses: 4
+  show_progress: false # false saves time
   cutouts:
     be-03-2013-era5:
       module: era5