diff --git a/core/management/commands/fix_doab_covers.py b/core/management/commands/fix_doab_covers.py
index 47e5d090..19e94189 100644
--- a/core/management/commands/fix_doab_covers.py
+++ b/core/management/commands/fix_doab_covers.py
@@ -12,7 +12,7 @@ class Command(BaseCommand):
     help = "fix bad covers for doab"
     
     def add_arguments(self, parser):
-        parser.add_argument('doab', nargs='?', type=str, default='', help="doab to fix")
+        parser.add_argument('doab', nargs='?', default='', help="doab to fix")
 
     def handle(self, doab, **options):
         if doab == 'list':
diff --git a/core/management/commands/harvest_online_ebooks.py b/core/management/commands/harvest_online_ebooks.py
index 4795f89c..6ab992fe 100644
--- a/core/management/commands/harvest_online_ebooks.py
+++ b/core/management/commands/harvest_online_ebooks.py
@@ -11,8 +11,8 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('limit', nargs='?', type=int, default=0, help="max to harvest")
         parser.add_argument('--ebook', nargs='?', type=int, default=0, help="ebook to harvest")
-        parser.add_argument('--provider', nargs='?', type=str, default='', help="provider to harvest")
-        parser.add_argument('--format', nargs='?', type=str, default='online', help="format to harvest")
+        parser.add_argument('--provider', nargs='?', default='', help="provider to harvest")
+        parser.add_argument('--format', nargs='?', default='online', help="format to harvest")
 
     def handle(self, limit=0, **options):
         limit = int(limit) if limit else 0
diff --git a/core/management/commands/harvest_remote_ebooks.py b/core/management/commands/harvest_remote_ebooks.py
index 779fe053..386a7806 100644
--- a/core/management/commands/harvest_remote_ebooks.py
+++ b/core/management/commands/harvest_remote_ebooks.py
@@ -15,8 +15,8 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('limit', nargs='?', type=int, default=0, help="max to harvest")
         parser.add_argument('--ebook', nargs='?', type=int, default=0, help="ebook to harvest")
-        parser.add_argument('--provider', nargs='?', type=str, default='', help="provider to harvest")
-        parser.add_argument('--format', nargs='?', type=str, default='all', help="format to harvest")
+        parser.add_argument('--provider', nargs='?', default='', help="provider to harvest")
+        parser.add_argument('--format', nargs='?', default='all', help="format to harvest")
 
     def handle(self, limit=0, **options):
         limit = int(limit) if limit else 0
diff --git a/core/management/commands/load_by_doab.py b/core/management/commands/load_by_doab.py
index 2022bc45..0df98aca 100644
--- a/core/management/commands/load_by_doab.py
+++ b/core/management/commands/load_by_doab.py
@@ -6,7 +6,7 @@ class Command(BaseCommand):
     help = "load doab books by doab_id via oai"
 
     def add_arguments(self, parser):
-        parser.add_argument('doab_ids', nargs='+', type=str, default=1, help="doab ids to add")    
+        parser.add_argument('doab_ids', nargs='+', default=1, help="doab ids to add")    
     
     def handle(self, doab_ids, **options):
         for doab_id in doab_ids:
diff --git a/core/management/commands/load_doab.py b/core/management/commands/load_doab.py
index 374e59b7..ba25eba9 100644
--- a/core/management/commands/load_doab.py
+++ b/core/management/commands/load_doab.py
@@ -12,7 +12,7 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('from_date', nargs='?', type=timefromiso,
                             default=None, help="YYYY-MM-DD to start")
-        parser.add_argument('--from_id', nargs='?', type=str, default='', help="handle to start with")    
+        parser.add_argument('--from_id', nargs='?', default='', help="handle to start with")    
         parser.add_argument('--max', nargs='?', type=int, default=None, help="max desired records")    
     
     def handle(self, **options):
diff --git a/core/management/commands/remove_404s.py b/core/management/commands/remove_404s.py
index 9ad14482..bf98f944 100644
--- a/core/management/commands/remove_404s.py
+++ b/core/management/commands/remove_404s.py
@@ -10,8 +10,8 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('limit', nargs='?', type=int, default=50, help="max to check")
         parser.add_argument('--ebook', nargs='?', type=int, default=0, help="ebook to check")
-        parser.add_argument('--provider', nargs='?', type=str, default='', help="provider to check")
-        parser.add_argument('--format', nargs='?', type=str, default='online', help="format to check")
+        parser.add_argument('--provider', nargs='?', default='', help="provider to check")
+        parser.add_argument('--format', nargs='?', default='online', help="format to check")
 
     def handle(self, limit=0, **options):
         limit = int(limit) if limit else 0