--- a/CHANGES	Fri Jan 26 17:32:23 2018 +0100
+++ b/CHANGES	Wed Jan 31 13:34:54 2018 +0100
@@ -1,3 +1,10 @@
+2.x 20xx-xx-xx UNRELEASED
+
+ * optparse to argparse Migration.
+   The optparse module is deprecated and will not be developed further.The
+   development will continue with the argparse module.
+   Patch by Magnus Schieder
+
 2.2 2018-01-26
 
  * The problem with unwanted multi moves and deletions is solved.

--- a/getan/__init__.py	Fri Jan 26 17:32:23 2018 +0100
+++ b/getan/__init__.py	Wed Jan 31 13:34:54 2018 +0100
@@ -6,5 +6,5 @@
 # This is Free Software licensed under the terms of GPLv3 or later.
 # For details see LICENSE coming with the source of 'getan'.
 
-__version_info__ = ("2", "2")
+__version_info__ = ("2", "3", "dev1")
 __version__ = '.'.join(__version_info__)

--- a/getan/main.py	Fri Jan 26 17:32:23 2018 +0100
+++ b/getan/main.py	Wed Jan 31 13:34:54 2018 +0100
@@ -13,8 +13,7 @@
 import logging
 import os
 import os.path
-
-from optparse import OptionParser
+import argparse
 
 import getan
 import getan.config as config
@@ -27,29 +26,37 @@
 
 def main():
 
-    usage = "usage: %prog [options] [databasefile (default: " + \
+    usage = "%(prog)s [options] [databasefile (default: " + \
         DEFAULT_DATABASE + ")]"
     version = "getan version %s" % getan.__version__
-    parser = OptionParser(usage=usage, version=version)
-    parser.add_option("--init-only", action="store_true", dest="initonly",
-                      help="create databasefile if necessary and exit")
-    parser.add_option("-d", "--debug", action="store_true", dest="debug",
-                      help="set verbosity to debug")
-    parser.add_option("-l", "--logfile", dest="logfile", metavar="FILE",
-                      help="write log information to FILE [default: %default]",
-                      default="getan.log")
-    (options, args) = parser.parse_args()
+
+    parser = argparse.ArgumentParser(prog='getan', usage=usage)
+    parser.add_argument('--version', action='version', version=version)
+    parser.add_argument(dest='filename', nargs='?',
+                        help='[databasefile (default: time.db)]')
+    parser.add_argument('--init-only', action='store_true', dest='initonly',
+                        help='create databasefile if necessary and exit')
+    parser.add_argument('-d', '--debug', action='store_true', dest='debug',
+                        help='set verbosity to debug')
+    # Default value of the logfile name is defined in .getan/config.py.
+    parser.add_argument('-l', '--logfile', dest='logfile', metavar='FILE',
+                    help='write log information to FILE [default: getan.log]',
+                        nargs='?')
+
+    args = parser.parse_args()
+
     logargs = dict()
-    if options.debug:
+
+    if args.debug:
         logargs["level"] = logging.DEBUG
-    if options.logfile:
-        logargs["filename"] = options.logfile
+    if args.logfile:
+        logargs["filename"] = args.logfile
     config.initialize(**logargs)
     global logger
 
-    if len(args) > 0:
-        backend = Backend(args[0])
-        logging.info("Using database '%s'." % args[0])
+    if args.filename != None :
+        backend = Backend(args.filename)
+        logging.info("Using database '%s'." % args.filename)
     else:
         if os.path.isfile(DEFAULT_DATABASE):
             database = os.path.abspath(DEFAULT_DATABASE)
@@ -62,7 +69,7 @@
         backend = Backend(database)
         logging.info("Using database '%s'." % database)
 
-    if options.initonly:
+    if args.initonly:
         return
 
     controller = GetanController(backend)