diff --git a/docs/cli-options.rst b/docs/cli-options.rst
index 2b6e6fc..1b585e9 100644
--- a/docs/cli-options.rst
+++ b/docs/cli-options.rst
@@ -192,3 +192,20 @@ Miscellaneous Options
    Disable user interaction, i.e. do not print messages (except errors) and fail
    if login credentials are needed but not given.
    This is handy for running :ref:`instaloader-as-cronjob`.
+
+.. option:: +args.txt
+
+    Read arguments from file `args.txt`, a shortcut to provide argument from
+    file rather than command-line. This provide a convient way to hide login
+    info from CLI. and also can use for simplify managment of long arguments.
+
+    .. note::
+
+        text file should separate arg with line break.
+
+        args.txt example::
+
+            --login MYUSENAME
+            --password MYPASSWORD
+            --fast-update
+
diff --git a/instaloader/__main__.py b/instaloader/__main__.py
index a8f5aae..f340c6d 100644
--- a/instaloader/__main__.py
+++ b/instaloader/__main__.py
@@ -207,7 +207,8 @@ def main():
     parser = ArgumentParser(description=__doc__, add_help=False, usage=usage_string(),
                             epilog="Report issues at https://github.com/instaloader/instaloader/issues. "
                                    "The complete documentation can be found at "
-                                   "https://instaloader.github.io/.")
+                                   "https://instaloader.github.io/.",
+                            fromfile_prefix_chars='+')
 
     g_what = parser.add_argument_group('What to Download',
                                        'Specify a list of profiles or #hashtags. For each of these, Instaloader '