diff --git a/scripts/build_ammonia_production.py b/scripts/build_ammonia_production.py
index 3ba7175d..16ed4ce2 100644
--- a/scripts/build_ammonia_production.py
+++ b/scripts/build_ammonia_production.py
@@ -6,8 +6,8 @@
 Build ammonia production.
 """
 
-import pandas as pd
 import country_converter as coco
+import pandas as pd
 
 cc = coco.CountryConverter()
 
@@ -27,7 +27,7 @@ if __name__ == "__main__":
         skipfooter=19,
     )
 
-    ammonia.index = cc.convert(ammonia.index, to='iso2')
+    ammonia.index = cc.convert(ammonia.index, to="iso2")
 
     years = [str(i) for i in range(2013, 2018)]
     countries = ammonia.index.intersection(snakemake.config["countries"])
diff --git a/scripts/build_energy_totals.py b/scripts/build_energy_totals.py
index 814e7ed5..9d30ba6a 100644
--- a/scripts/build_energy_totals.py
+++ b/scripts/build_energy_totals.py
@@ -10,10 +10,10 @@ logger = logging.getLogger(__name__)
 import multiprocessing as mp
 from functools import partial
 
+import country_converter as coco
 import geopandas as gpd
 import numpy as np
 import pandas as pd
-import country_converter as coco
 from _helpers import mute_print
 from tqdm import tqdm
 
@@ -86,7 +86,7 @@ eurostat_codes = {
 
 idees_rename = {"GR": "EL", "GB": "UK"}
 
-eu28 = cc.EU28as('ISO2').ISO2.tolist()
+eu28 = cc.EU28as("ISO2").ISO2.tolist()
 
 eu28_eea = eu28.copy()
 eu28_eea.remove("GB")
diff --git a/scripts/build_industrial_energy_demand_per_country_today.py b/scripts/build_industrial_energy_demand_per_country_today.py
index 1d64ecaf..3fa9ef56 100644
--- a/scripts/build_industrial_energy_demand_per_country_today.py
+++ b/scripts/build_industrial_energy_demand_per_country_today.py
@@ -10,8 +10,8 @@ Build industrial energy demand per country.
 import multiprocessing as mp
 from functools import partial
 
-import pandas as pd
 import country_converter as coco
+import pandas as pd
 from tqdm import tqdm
 
 cc = coco.CountryConverter()
@@ -59,7 +59,7 @@ fuels = {
     "Electricity": "electricity",
 }
 
-eu28 = cc.EU28as('ISO2').ISO2.tolist()
+eu28 = cc.EU28as("ISO2").ISO2.tolist()
 
 jrc_names = {"GR": "EL", "GB": "UK"}
 
diff --git a/scripts/build_industrial_production_per_country.py b/scripts/build_industrial_production_per_country.py
index 97a116f5..8a4c19c2 100644
--- a/scripts/build_industrial_production_per_country.py
+++ b/scripts/build_industrial_production_per_country.py
@@ -14,9 +14,9 @@ logger = logging.getLogger(__name__)
 
 import multiprocessing as mp
 
+import country_converter as coco
 import numpy as np
 import pandas as pd
-import country_converter as coco
 from _helpers import mute_print
 from tqdm import tqdm
 
@@ -39,7 +39,7 @@ sub_sheet_name_dict = {
     "Other Industrial Sectors": "OIS",
 }
 
-eu28 = cc.EU28as('ISO2').ISO2.values
+eu28 = cc.EU28as("ISO2").ISO2.values
 
 jrc_names = {"GR": "EL", "GB": "UK"}