diff --git a/lib/core/datatype.py b/lib/core/datatype.py
index 12838b977..739780d5b 100644
--- a/lib/core/datatype.py
+++ b/lib/core/datatype.py
@@ -5,7 +5,6 @@ Copyright (c) 2006-2021 sqlmap developers (http://sqlmap.org/)
 See the file 'LICENSE' for copying permission
 """
 
-import collections
 import copy
 import types
 
diff --git a/lib/core/settings.py b/lib/core/settings.py
index c6ae1e02e..5f3c766cd 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 = "1.5.1.30"
+VERSION = "1.5.1.31"
 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)