diff --git a/lib/controller/checks.py b/lib/controller/checks.py
index 334cc7511..df951b106 100644
--- a/lib/controller/checks.py
+++ b/lib/controller/checks.py
@@ -1588,7 +1588,7 @@ def checkConnection(suppressOutput=False):
                 conf.url = re.sub(r"https?://", "https://", conf.url)
                 match = re.search(r":(\d+)", threadData.lastRedirectURL[1])
                 port = match.group(1) if match else 443
-                conf.url = re.sub(r":\d+/", ":%s/" % port, conf.url)
+                conf.url = re.sub(r":\d+(/|\Z)", ":%s\g<1>" % port, conf.url)
 
     except SqlmapConnectionException, ex:
         if conf.ipv6:
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 6e6f49ce0..c8bf60b3f 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 = "1.3.1.27"
+VERSION = "1.3.1.28"
 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 36a437b0d..9f69be096 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -23,7 +23,7 @@ fb6be55d21a70765e35549af2484f762  extra/sqlharvest/__init__.py
 fb6be55d21a70765e35549af2484f762  extra/wafdetectify/__init__.py
 f73623c18b7f6ebb71f10e124b1b93c9  extra/wafdetectify/wafdetectify.py
 d0f2b424f5b2b06f26cdd7076d61be6e  lib/controller/action.py
-02190e90bd7be774f800b7eabe589dd9  lib/controller/checks.py
+4b20581ddd8d026b8cad8a4b3e3aaad6  lib/controller/checks.py
 3c18f0b1d1b9fda682201a264f170b31  lib/controller/controller.py
 e97a9d34fef5761a8eab6432ce3c7c53  lib/controller/handler.py
 fb6be55d21a70765e35549af2484f762  lib/controller/__init__.py
@@ -49,7 +49,7 @@ fe370021c6bc99daf44b2bfc0d1effb3  lib/core/patch.py
 9a7d68d5fa01561500423791f15cc676  lib/core/replication.py
 3179d34f371e0295dd4604568fb30bcd  lib/core/revision.py
 d6269c55789f78cf707e09a0f5b45443  lib/core/session.py
-84d85e640164d17ee42889a68413344c  lib/core/settings.py
+19d561e7ba93f697cc8ec095051fed5a  lib/core/settings.py
 a8a7501d1e6b21669b858a62e921d191  lib/core/shell.py
 5dc606fdf0afefd4b305169c21ab2612  lib/core/subprocessng.py
 eec3080ba5baca44c6de4595f1c92a0d  lib/core/target.py