diff --git a/configargparse.py b/configargparse.py
index 4b93dec..33a2ccf 100644
--- a/configargparse.py
+++ b/configargparse.py
@@ -1447,21 +1447,24 @@ def already_on_command_line(existing_args_list, potential_command_line_args, pre
 
 # add all public classes and constants from argparse module's namespace to this
 # module's namespace so that the 2 modules are truly interchangeable
-HelpFormatter = argparse.HelpFormatter
-RawDescriptionHelpFormatter = argparse.RawDescriptionHelpFormatter
-RawTextHelpFormatter = argparse.RawTextHelpFormatter
+Action = argparse.Action
 ArgumentDefaultsHelpFormatter = argparse.ArgumentDefaultsHelpFormatter
 ArgumentError = argparse.ArgumentError
 ArgumentTypeError = argparse.ArgumentTypeError
-Action = argparse.Action
 FileType = argparse.FileType
+HelpFormatter = argparse.HelpFormatter
+MetavarTypeHelpFormatter = argparse.MetavarTypeHelpFormatter
 Namespace = argparse.Namespace
+RawDescriptionHelpFormatter = argparse.RawDescriptionHelpFormatter
+RawTextHelpFormatter = argparse.RawTextHelpFormatter
 ONE_OR_MORE = argparse.ONE_OR_MORE
 OPTIONAL = argparse.OPTIONAL
+PARSER = argparse.PARSER
 REMAINDER = argparse.REMAINDER
 SUPPRESS = argparse.SUPPRESS
 ZERO_OR_MORE = argparse.ZERO_OR_MORE
 
+
 # deprecated PEP-8 incompatible API names.
 initArgumentParser = init_argument_parser
 getArgumentParser = get_argument_parser
diff --git a/setup.py b/setup.py
index c0bc0b7..116db24 100644
--- a/setup.py
+++ b/setup.py
@@ -82,7 +82,7 @@ def launch_http_server(directory):
 
 setup(
     name='ConfigArgParse',
-    version="1.5.5",
+    version="1.7",
     description='A drop-in replacement for argparse that allows options to '
                 'also be set via config files and/or environment variables.',
     long_description=long_description,