diff --git a/lib/core/common.py b/lib/core/common.py
index 37545c575..9df7c6820 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -1436,7 +1436,7 @@ def parseTargetUrl():
     else:
         conf.port = 80
 
-    if conf.port < 0 or conf.port > 65535:
+    if conf.port < 1 or conf.port > 65535:
         errMsg = "invalid target URL's port (%d)" % conf.port
         raise SqlmapSyntaxException(errMsg)
 
diff --git a/lib/core/settings.py b/lib/core/settings.py
index af6c2a85d..6fdcc81e0 100755
--- 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 = "1.1.7.18"
+VERSION = "1.1.7.19"
 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 7c6ff221e..9652bc18e 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -21,13 +21,13 @@ c55b400b72acc43e0e59c87dd8bb8d75  extra/shellcodeexec/windows/shellcodeexec.x32.
 310efc965c862cfbd7b0da5150a5ad36  extra/sqlharvest/__init__.py
 7713aa366c983cdf1f3dbaa7383ea9e1  extra/sqlharvest/sqlharvest.py
 7afe836fd97271ccba67b4c0da2482ff  lib/controller/action.py
-f77daa397016460433d5e06704efd538  lib/controller/checks.py
+c9733bcd06caea8262240262e4c6a06a  lib/controller/checks.py
 130d1c16708668b8d89605b6b5b38bf5  lib/controller/controller.py
 a97df93b552ee4e4ba3692eae870de7c  lib/controller/handler.py
 310efc965c862cfbd7b0da5150a5ad36  lib/controller/__init__.py
 49b4e3b75322bf5f95b1568633bc7914  lib/core/agent.py
 6cc95a117fbd34ef31b9aa25520f0e31  lib/core/bigarray.py
-f2e4219a187af507fd07bb08534a9ae1  lib/core/common.py
+0040490cdda0118a065ddc2e5bb8d108  lib/core/common.py
 5065a4242a8cccf72f91e22e1007ae63  lib/core/convert.py
 a8143dab9d3a27490f7d49b6b29ea530  lib/core/data.py
 7936d78b1a7f1f008ff92bf2f88574ba  lib/core/datatype.py
@@ -46,12 +46,12 @@ f664e993a4e4d0f8b3153778bec49794  lib/core/option.py
 d8e9250f3775119df07e9070eddccd16  lib/core/replication.py
 785f86e3f963fa3798f84286a4e83ff2  lib/core/revision.py
 40c80b28b3a5819b737a5a17d4565ae9  lib/core/session.py
-e5d65791152de7ebd8b0e96956c4c8e2  lib/core/settings.py
+9057e2954f45a1d39f5fe6edeafae709  lib/core/settings.py
 d91291997d2bd2f6028aaf371bf1d3b6  lib/core/shell.py
 2ad85c130cc5f2b3701ea85c2f6bbf20  lib/core/subprocessng.py
 080dad10c8350a66fd5321935b53fa70  lib/core/target.py
 8970b88627902239d695280b1160e16c  lib/core/testing.py
-b8306192d980abdc8d669c024511e9a1  lib/core/threads.py
+40881e63d516d8304fc19971049cded0  lib/core/threads.py
 ad74fc58fc7214802fd27067bce18dd2  lib/core/unescaper.py
 1f1fa616b5b19308d78c610ec8046399  lib/core/update.py
 4d13ed693401a498b6d073a2a494bd83  lib/core/wordlist.py
@@ -103,7 +103,7 @@ db3090ff9a740ba096ba676fcf44ebfc  lib/techniques/union/use.py
 c08d2487a53a1db8170178ebcf87c864  lib/utils/crawler.py
 ba12c69a90061aa14d848b8396e79191  lib/utils/deps.py
 3b9fd519164e0bf275d5fd361c3f11ff  lib/utils/getch.py
-7143c26b3e18973bc5169c202b775245  lib/utils/har.py
+95d27ccdb712e9a750337daeb75ab12b  lib/utils/har.py
 ccfdad414ce2ec0c394c3deaa39a82bf  lib/utils/hashdb.py
 12e0e0ab70c6fe5786bc561c35dc067f  lib/utils/hash.py
 e76a08237ee6a4cd6855af79610ea8a5  lib/utils/htmlentities.py