diff --git a/src/adler/adler.py b/src/adler/adler.py
index 334d2b3..2d390a1 100644
--- a/src/adler/adler.py
+++ b/src/adler/adler.py
@@ -12,7 +12,7 @@ def runAdler(args):
 def main():
     parser = argparse.ArgumentParser(description="Runs Adler for a select planetoid and given user input.")
 
-    parser.add_argument("-s", "--ssoid", help="SSObject ID of planetoid.", type="str", required=True)
+    parser.add_argument("-s", "--ssoid", help="SSObject ID of planetoid.", type=str, required=True)
 
     # can add arguments to specify a date range etc later
     # alternatively we may start using a config file