diff --git a/lib/core/option.py b/lib/core/option.py
index 1cb06f946..2ed1b9677 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -5,6 +5,7 @@ Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
 See the file 'LICENSE' for copying permission
 """
 
+import functools
 import glob
 import inspect
 import logging
@@ -52,6 +53,7 @@ from lib.core.common import setOptimize
 from lib.core.common import setPaths
 from lib.core.common import singleTimeWarnMessage
 from lib.core.common import urldecode
+from lib.core.compat import cmp
 from lib.core.compat import round
 from lib.core.compat import xrange
 from lib.core.convert import getUnicode
@@ -822,7 +824,7 @@ def _setTamperingFunctions():
             logger.warning(warnMsg)
 
         if resolve_priorities and priorities:
-            priorities.sort(reverse=True)
+            priorities.sort(key=functools.cmp_to_key(lambda a, b: cmp(a[0], b[0])), reverse=True)
             kb.tamperFunctions = []
 
             for _, function in priorities:
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 9a04e5dd6..99440e488 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty import six
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.3.5.59"
+VERSION = "1.3.5.60"
 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)