diff --git a/extra/safe2bin/README.txt b/extra/safe2bin/README.txt
deleted file mode 100644
index 06400d6ea..000000000
--- a/extra/safe2bin/README.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-To use safe2bin.py you need to pass it the original file,
-and optionally the output file name.
-
-Example:
-
-$ python ./safe2bin.py -i output.txt -o output.txt.bin
-
-This will create an binary decoded file output.txt.bin. For example, 
-if the content of output.txt is: "\ttest\t\x32\x33\x34\nnewline" it will 
-be decoded to: "	test	234
-newline"
-
-If you skip the output file name, general rule is that the binary
-file names are suffixed with the string '.bin'. So, that means that 
-the upper example can also be written in the following form:
-
-$ python ./safe2bin.py -i output.txt
diff --git a/extra/safe2bin/__init__.py b/extra/safe2bin/__init__.py
deleted file mode 100644
index c654cbef7..000000000
--- a/extra/safe2bin/__init__.py
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/usr/bin/env python
-
-"""
-Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
-See the file 'LICENSE' for copying permission
-"""
-
-pass
diff --git a/lib/core/common.py b/lib/core/common.py
index 30e472d05..7da5064b8 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -46,7 +46,6 @@ from xml.sax import SAXParseException
 
 from extra.beep.beep import beep
 from extra.cloak.cloak import decloak
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.bigarray import BigArray
 from lib.core.compat import cmp
 from lib.core.compat import round
@@ -180,6 +179,7 @@ from lib.core.settings import VERSION_STRING
 from lib.core.settings import ZIP_HEADER
 from lib.core.settings import WEBSCARAB_SPLITTER
 from lib.core.threads import getCurrentThreadData
+from lib.utils.safe2bin import safecharencode
 from lib.utils.sqlalchemy import _sqlalchemy
 from thirdparty import six
 from thirdparty.clientform.clientform import ParseResponse
diff --git a/lib/core/dump.py b/lib/core/dump.py
index 846c445bd..4988f103e 100644
--- a/lib/core/dump.py
+++ b/lib/core/dump.py
@@ -13,7 +13,6 @@ import shutil
 import tempfile
 import threading
 
-from extra.safe2bin.safe2bin import safechardecode
 from lib.core.common import Backend
 from lib.core.common import checkFile
 from lib.core.common import dataToDumpFile
@@ -53,6 +52,7 @@ from lib.core.settings import UNICODE_ENCODING
 from lib.core.settings import UNSAFE_DUMP_FILEPATH_REPLACEMENT
 from lib.core.settings import VERSION_STRING
 from lib.core.settings import WINDOWS_RESERVED_NAMES
+from lib.utils.safe2bin import safechardecode
 from thirdparty import six
 from thirdparty.magic import magic
 
diff --git a/lib/core/replication.py b/lib/core/replication.py
index e68710618..d0a1a3d1e 100644
--- a/lib/core/replication.py
+++ b/lib/core/replication.py
@@ -7,13 +7,13 @@ See the file 'LICENSE' for copying permission
 
 import sqlite3
 
-from extra.safe2bin.safe2bin import safechardecode
 from lib.core.common import getSafeExString
 from lib.core.common import unsafeSQLIdentificatorNaming
 from lib.core.exception import SqlmapConnectionException
 from lib.core.exception import SqlmapGenericException
 from lib.core.exception import SqlmapValueException
 from lib.core.settings import UNICODE_ENCODING
+from lib.utils.safe2bin import safechardecode
 
 class Replication(object):
     """
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 2e3a23602..7f0cb6dfc 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.3.9.8"
+VERSION = "1.3.9.9"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/lib/request/connect.py b/lib/request/connect.py
index bf455f2ed..4f9593fa6 100644
--- a/lib/request/connect.py
+++ b/lib/request/connect.py
@@ -22,7 +22,6 @@ except ImportError:
     class WebSocketException(Exception):
         pass
 
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.agent import agent
 from lib.core.common import asciifyUrl
 from lib.core.common import calculateDeltaSeconds
@@ -125,6 +124,7 @@ from lib.request.basic import processResponse
 from lib.request.comparison import comparison
 from lib.request.direct import direct
 from lib.request.methodrequest import MethodRequest
+from lib.utils.safe2bin import safecharencode
 from thirdparty import six
 from thirdparty.odict import OrderedDict
 from thirdparty.six import unichr as _unichr
diff --git a/lib/request/direct.py b/lib/request/direct.py
index 14c5e1c0b..b107cb599 100644
--- a/lib/request/direct.py
+++ b/lib/request/direct.py
@@ -7,7 +7,6 @@ See the file 'LICENSE' for copying permission
 
 import time
 
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.agent import agent
 from lib.core.common import Backend
 from lib.core.common import calculateDeltaSeconds
@@ -26,6 +25,7 @@ from lib.core.enums import DBMS
 from lib.core.enums import EXPECTED
 from lib.core.enums import TIMEOUT_STATE
 from lib.core.settings import UNICODE_ENCODING
+from lib.utils.safe2bin import safecharencode
 from lib.utils.timeout import timeout
 
 def direct(query, content=True):
diff --git a/lib/takeover/abstraction.py b/lib/takeover/abstraction.py
index ffcd5d89f..d4c2b4c51 100644
--- a/lib/takeover/abstraction.py
+++ b/lib/takeover/abstraction.py
@@ -9,7 +9,6 @@ from __future__ import print_function
 
 import sys
 
-from extra.safe2bin.safe2bin import safechardecode
 from lib.core.common import Backend
 from lib.core.common import dataToStdout
 from lib.core.common import getSQLSnippet
@@ -28,6 +27,7 @@ from lib.request import inject
 from lib.takeover.udf import UDF
 from lib.takeover.web import Web
 from lib.takeover.xp_cmdshell import XP_cmdshell
+from lib.utils.safe2bin import safechardecode
 from thirdparty.six.moves import input as _input
 
 class Abstraction(Web, UDF, XP_cmdshell):
diff --git a/lib/techniques/blind/inference.py b/lib/techniques/blind/inference.py
index 85dc3629a..cd6289b88 100644
--- a/lib/techniques/blind/inference.py
+++ b/lib/techniques/blind/inference.py
@@ -10,7 +10,6 @@ from __future__ import division
 import re
 import time
 
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.agent import agent
 from lib.core.common import Backend
 from lib.core.common import calculateDeltaSeconds
@@ -58,6 +57,7 @@ from lib.core.threads import runThreads
 from lib.core.unescaper import unescaper
 from lib.request.connect import Connect as Request
 from lib.utils.progress import ProgressBar
+from lib.utils.safe2bin import safecharencode
 from lib.utils.xrange import xrange
 
 def bisection(payload, expression, length=None, charsetType=None, firstChar=None, lastChar=None, dump=False):
diff --git a/lib/techniques/dns/use.py b/lib/techniques/dns/use.py
index 1e9bde529..bca5594b8 100644
--- a/lib/techniques/dns/use.py
+++ b/lib/techniques/dns/use.py
@@ -8,7 +8,6 @@ See the file 'LICENSE' for copying permission
 import re
 import time
 
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.agent import agent
 from lib.core.common import Backend
 from lib.core.common import calculateDeltaSeconds
@@ -33,6 +32,7 @@ from lib.core.settings import MAX_DNS_LABEL
 from lib.core.settings import PARTIAL_VALUE_MARKER
 from lib.core.unescaper import unescaper
 from lib.request.connect import Connect as Request
+from lib.utils.safe2bin import safecharencode
 
 def dnsUse(payload, expression):
     """
diff --git a/lib/techniques/error/use.py b/lib/techniques/error/use.py
index 478aa86ae..783a2e952 100644
--- a/lib/techniques/error/use.py
+++ b/lib/techniques/error/use.py
@@ -10,7 +10,6 @@ from __future__ import print_function
 import re
 import time
 
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.agent import agent
 from lib.core.bigarray import BigArray
 from lib.core.common import Backend
@@ -60,6 +59,7 @@ from lib.core.threads import runThreads
 from lib.core.unescaper import unescaper
 from lib.request.connect import Connect as Request
 from lib.utils.progress import ProgressBar
+from lib.utils.safe2bin import safecharencode
 from thirdparty import six
 
 def _oneShotErrorUse(expression, field=None, chunkTest=False):
diff --git a/lib/techniques/union/use.py b/lib/techniques/union/use.py
index 640c66874..6df868628 100644
--- a/lib/techniques/union/use.py
+++ b/lib/techniques/union/use.py
@@ -10,7 +10,6 @@ import re
 import time
 import xml.etree.ElementTree
 
-from extra.safe2bin.safe2bin import safecharencode
 from lib.core.agent import agent
 from lib.core.bigarray import BigArray
 from lib.core.common import arrayizeValue
@@ -62,6 +61,7 @@ from lib.core.threads import runThreads
 from lib.core.unescaper import unescaper
 from lib.request.connect import Connect as Request
 from lib.utils.progress import ProgressBar
+from lib.utils.safe2bin import safecharencode
 from thirdparty import six
 from thirdparty.odict import OrderedDict
 
diff --git a/lib/utils/pivotdumptable.py b/lib/utils/pivotdumptable.py
index 74a4feba9..27774ad3f 100644
--- a/lib/utils/pivotdumptable.py
+++ b/lib/utils/pivotdumptable.py
@@ -7,7 +7,6 @@ See the file 'LICENSE' for copying permission
 
 import re
 
-from extra.safe2bin.safe2bin import safechardecode
 from lib.core.agent import agent
 from lib.core.bigarray import BigArray
 from lib.core.common import Backend
@@ -33,6 +32,7 @@ from lib.core.settings import MAX_INT
 from lib.core.settings import NULL
 from lib.core.unescaper import unescaper
 from lib.request import inject
+from lib.utils.safe2bin import safechardecode
 from thirdparty.six import unichr as _unichr
 
 def pivotDumpTable(table, colList, count=None, blind=True, alias=None):
diff --git a/extra/safe2bin/safe2bin.py b/lib/utils/safe2bin.py
similarity index 71%
rename from extra/safe2bin/safe2bin.py
rename to lib/utils/safe2bin.py
index 7fbf7cf69..b8e7d1482 100644
--- a/extra/safe2bin/safe2bin.py
+++ b/lib/utils/safe2bin.py
@@ -1,23 +1,15 @@
 #!/usr/bin/env python
 
 """
-safe2bin.py - Simple safe(hex) to binary format converter
-
 Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
 See the file 'LICENSE' for copying permission
 """
 
-from __future__ import print_function
-
 import binascii
 import re
 import string
-import os
 import sys
 
-from optparse import OptionError
-from optparse import OptionParser
-
 if sys.version_info >= (3, 0):
     xrange = range
     text_type = str
@@ -49,10 +41,10 @@ def safecharencode(value):
     """
     Returns safe representation of a given basestring value
 
-    >>> safecharencode(u'test123')
-    u'test123'
-    >>> safecharencode(u'test\x01\x02\xff')
-    u'test\\01\\02\\03\\ff'
+    >>> safecharencode(u'test123') == u'test123'
+    True
+    >>> safecharencode(u'test\x01\x02\xaf') == u'test\\\\x01\\\\x02\\xaf'
+    True
     """
 
     retVal = value
@@ -107,37 +99,3 @@ def safechardecode(value, binary=False):
             retVal[i] = safechardecode(value[i])
 
     return retVal
-
-def main():
-    usage = '%s -i <input file> [-o <output file>]' % sys.argv[0]
-    parser = OptionParser(usage=usage, version='0.1')
-
-    try:
-        parser.add_option('-i', dest='inputFile', help='Input file')
-        parser.add_option('-o', dest='outputFile', help='Output file')
-
-        (args, _) = parser.parse_args()
-
-        if not args.inputFile:
-            parser.error('Missing the input file, -h for help')
-
-    except (OptionError, TypeError) as ex:
-        parser.error(ex)
-
-    if not os.path.isfile(args.inputFile):
-        print('ERROR: the provided input file \'%s\' is not a regular file' % args.inputFile)
-        sys.exit(1)
-
-    f = open(args.inputFile, 'r')
-    data = f.read()
-    f.close()
-
-    if not args.outputFile:
-        args.outputFile = args.inputFile + '.bin'
-
-    f = open(args.outputFile, 'wb')
-    f.write(safechardecode(data))
-    f.close()
-
-if __name__ == '__main__':
-    main()