diff --git a/adblock_to_domain_list.py b/adblock_to_domain_list.py
index 7c8bf82..4a4c017 100755
--- a/adblock_to_domain_list.py
+++ b/adblock_to_domain_list.py
@@ -29,7 +29,7 @@ if __name__ == '__main__':
 
     # Parsing arguments
     parser = argparse.ArgumentParser(
-        description="TODO")
+        description="Extract whole domains from an AdBlock blocking list")
     parser.add_argument(
         '-i', '--input', type=argparse.FileType('r'), default=sys.stdin,
         help="Input file with AdBlock rules")
diff --git a/fetch_resources.sh b/fetch_resources.sh
index 705b0c4..5b023d5 100755
--- a/fetch_resources.sh
+++ b/fetch_resources.sh
@@ -22,8 +22,10 @@ sort -R nameservers.temp >> nameservers
 rm nameservers.temp
 
 # Get top 1M subdomains
-wget http://s3-us-west-1.amazonaws.com/umbrella-static/top-1m.csv.zip
+dl http://s3-us-west-1.amazonaws.com/umbrella-static/top-1m.csv.zip top-1m.csv.zip
 unzip top-1m.csv.zip
-sed 's|^[0-9]\+,||' top-1m.csv > subdomains/cisco-umbrella_popularity.cache.list
+sed 's|^[0-9]\+,||' top-1m.csv > temp/cisco-umbrella_popularity.fresh.list
 rm top-1m.csv top-1m.csv.zip
+cp subdomains/cisco-umbrella_popularity.cache.list temp/cisco-umbrella_popularity.old.list
+cat temp/cisco-umbrella_popularity.old.list temp/cisco-umbrella_popularity.fresh.list | sort -u > subdomains/cisco-umbrella_popularity.cache.list
 
diff --git a/resolve_subdomains.sh b/resolve_subdomains.sh
old mode 100644
new mode 100755