diff --git a/lib/controller/controller.py b/lib/controller/controller.py
index cc9646079..7b5ee9ce0 100644
--- a/lib/controller/controller.py
+++ b/lib/controller/controller.py
@@ -642,6 +642,9 @@ def start():
                         errMsg += "involved (e.g. WAF) maybe you could try to use "
                         errMsg += "option '--tamper' (e.g. '--tamper=space2comment')"
 
+                        if not conf.randomAgent:
+                            errMsg += " and/or switch '--random-agent'"
+
                     raise SqlmapNotVulnerableException(errMsg.rstrip('.'))
             else:
                 # Flush the flag
diff --git a/lib/core/settings.py b/lib/core/settings.py
index f6f6cdfbd..415e0f1e7 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import DBMS_DIRECTORY_NAME
 from lib.core.enums import OS
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.2.12.30"
+VERSION = "1.2.12.31"
 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)
diff --git a/txt/checksum.md5 b/txt/checksum.md5
index 48d6a68ff..147c9efda 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -24,7 +24,7 @@ b3e60ea4e18a65c48515d04aab28ff68  extra/sqlharvest/sqlharvest.py
 c1bccc94522d3425a372dcd57f78418e  extra/wafdetectify/wafdetectify.py
 3459c562a6abb9b4bdcc36925f751f3e  lib/controller/action.py
 0f0feede9750be810d2b8a7ab159b7b0  lib/controller/checks.py
-ae444b08253e10bc4553f011d6100b28  lib/controller/controller.py
+197bdf07f8ea15ecc7e0dafea4f9ae2f  lib/controller/controller.py
 988b548f6578adf9cec17afdeee8291c  lib/controller/handler.py
 1e5532ede194ac9c083891c2f02bca93  lib/controller/__init__.py
 e62309b22a59e60b270e62586f169441  lib/core/agent.py
@@ -49,7 +49,7 @@ c8c386d644d57c659d74542f5f57f632  lib/core/patch.py
 0c3eef46bdbf87e29a3f95f90240d192  lib/core/replication.py
 a7db43859b61569b601b97f187dd31c5  lib/core/revision.py
 fcb74fcc9577523524659ec49e2e964b  lib/core/session.py
-5192aa6feb4e6d598ec4334c39f9ba2f  lib/core/settings.py
+4bfede0eaaa7ad5767de41ef849de918  lib/core/settings.py
 a971ce157d04de96ba6e710d3d38a9a8  lib/core/shell.py
 a7edc9250d13af36ac0108f259859c19  lib/core/subprocessng.py
 1581be48127a3a7a9fd703359b6e7567  lib/core/target.py