diff --git a/rules/retrieve.smk b/rules/retrieve.smk
index 716b81c0..0fea03ac 100644
--- a/rules/retrieve.smk
+++ b/rules/retrieve.smk
@@ -188,6 +188,8 @@ if config["enable"]["retrieve"]:
 if config["enable"]["retrieve"]:
 
     rule retrieve_electricity_demand:
+        params:
+            versions=["2019-06-05", "2020-10-06"],
         output:
             RESOURCES + "load_raw.csv",
         log:
diff --git a/scripts/retrieve_electricity_demand.py b/scripts/retrieve_electricity_demand.py
index 58615755..58511857 100644
--- a/scripts/retrieve_electricity_demand.py
+++ b/scripts/retrieve_electricity_demand.py
@@ -27,11 +27,11 @@ if __name__ == "__main__":
     configure_logging(snakemake)
     set_scenario_config(snakemake)
 
-    versions = ["2019-06-05", "2020-10-06"]
     url = "https://data.open-power-system-data.org/time_series/{version}/time_series_60min_singleindex.csv"
 
     df1, df2 = [
-        pd.read_csv(url.format(version=version), index_col=0) for version in versions
+        pd.read_csv(url.format(version=version), index_col=0)
+        for version in snakemake.params.versions
     ]
     res = pd.concat([df1, df2[df2.index > df1.index[-1]]], join="inner")
     res.to_csv(snakemake.output[0])