diff --git a/rpg/RapidPeptidesGenerator.py b/rpg/RapidPeptidesGenerator.py
index edc07d0a002606101be00fc55556ea5ccbcb3e29..667326c6532337469a38f22fa122eac083f1cd83 100644
--- a/rpg/RapidPeptidesGenerator.py
+++ b/rpg/RapidPeptidesGenerator.py
@@ -232,11 +232,11 @@ def main():
     group_launch.add_argument("-a", "--addenzyme", action="store_true",
                               help="Create a new enzyme. See https://rapid-pe"\
                               "ptide-generator.readthedocs.io for more inform"\
-                              "ations")
+                              "ation")
     group_launch.add_argument("-b", "--delenzyme", metavar="",
                               help="Delete a user-define enzyme. See "\
                               "https://rapid-peptide-generator.readthedocs.io "\
-                              "for more informations")
+                              "for more information")
     parser.add_argument("-d", "--digest", metavar="",
                         choices=['s', 'sequential', 'c', 'concurrent'],
                         default="s", help="Digestion mode. Either 's', 'seque"