diff --git a/lib/core/common.py b/lib/core/common.py
index 6f25c3a13..f178a7342 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -1274,7 +1274,7 @@ def checkPipedInput():
     # Reference: https://stackoverflow.com/a/33873570
     """
 
-    return not os.isatty(sys.stdin.fileno()) if hasattr(sys.stdin, "fileno") else False
+    return hasattr(sys.stdin, "fileno") and not os.isatty(sys.stdin.fileno())
 
 def isZipFile(filename):
     """
@@ -1364,9 +1364,9 @@ def parsePasswordHash(password):
     >>> kb.forcedDbms = popValue()
     """
 
-    blank = " " * 8
+    blank = ' ' * 8
 
-    if isNoneValue(password) or password == " ":
+    if isNoneValue(password) or password == ' ':
         retVal = NULL
     else:
         retVal = password
@@ -1510,7 +1510,7 @@ def parseTargetDirect():
         if details:
             conf.dbms = details.group("dbms")
 
-            if details.group('credentials'):
+            if details.group("credentials"):
                 conf.dbmsUser = details.group("user")
                 conf.dbmsPass = details.group("pass")
             else:
@@ -1622,7 +1622,7 @@ def parseTargetUrl():
 
     originalUrl = conf.url
 
-    if re.search(r"\[.+\]", conf.url) and not socket.has_ipv6:
+    if re.search(r"://\[.+\]", conf.url) and not socket.has_ipv6:
         errMsg = "IPv6 communication is not supported "
         errMsg += "on this platform"
         raise SqlmapGenericException(errMsg)
diff --git a/lib/core/settings.py b/lib/core/settings.py
index e7184d296..e0a545370 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 = "1.4.5.23"
+VERSION = "1.4.5.24"
 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/lib/request/redirecthandler.py b/lib/request/redirecthandler.py
index 5ecc2a193..b9016fc01 100644
--- a/lib/request/redirecthandler.py
+++ b/lib/request/redirecthandler.py
@@ -154,6 +154,7 @@ class SmartRedirectHandler(_urllib.request.HTTPRedirectHandler):
                 except AttributeError:
                     def _(self):
                         return getattr(self, "hdrs") or {}
+
                     result.info = types.MethodType(_, result)
 
                 if not hasattr(result, "read"):
@@ -164,6 +165,7 @@ class SmartRedirectHandler(_urllib.request.HTTPRedirectHandler):
                             retVal = ""
                         finally:
                             return retVal
+
                     result.read = types.MethodType(_, result)
 
                 if not getattr(result, "url", None):
diff --git a/sqlmap.py b/sqlmap.py
index bab9ff774..caee7d577 100755
--- a/sqlmap.py
+++ b/sqlmap.py
@@ -534,4 +534,4 @@ if __name__ == "__main__":
             sys.exit(getattr(os, "_exitcode", 0))
 else:
     # cancelling postponed imports (because of Travis CI checks)
-    from lib.controller.controller import start
+    __import__("lib.controller.controller")