diff --git a/lib/core/settings.py b/lib/core/settings.py
index 773dbb362..c051186da 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -20,7 +20,7 @@ from thirdparty import six
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.5.9.27"
+VERSION = "1.5.9.28"
 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/lib/core/target.py b/lib/core/target.py
index b92dc815b..2c4cc0719 100644
--- a/lib/core/target.py
+++ b/lib/core/target.py
@@ -433,7 +433,7 @@ def _setHashDB():
     if os.path.exists(conf.hashDBFile):
         if conf.flushSession:
             if conf.hashDB:
-                conf.hashDB.close()
+                conf.hashDB.closeAll()
 
             try:
                 os.remove(conf.hashDBFile)
diff --git a/lib/core/testing.py b/lib/core/testing.py
index 05bf8d3e2..7fb4039f0 100644
--- a/lib/core/testing.py
+++ b/lib/core/testing.py
@@ -157,7 +157,7 @@ def vulnTest():
         for tag, value in (("<url>", url), ("<base>", base), ("<direct>", direct), ("<tmpdir>", tmpdir), ("<request>", request), ("<log>", log), ("<multiple>", multiple), ("<config>", config), ("<base64>", url.replace("id=1", "id=MZ=%3d"))):
             options = options.replace(tag, value)
 
-        cmd = "%s \"%s\" %s --batch --non-interactive --debug" % (sys.executable, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "sqlmap.py")), options)
+        cmd = "%s \"%s\" %s --batch --non-interactive --debug" % (sys.executable if ' ' not in sys.executable else '"%s"' % sys.executable, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "sqlmap.py")), options)
 
         if "<tmpfile>" in cmd:
             handle, tmp = tempfile.mkstemp()
diff --git a/lib/utils/hashdb.py b/lib/utils/hashdb.py
index 5fa0b26b5..7efb68571 100644
--- a/lib/utils/hashdb.py
+++ b/lib/utils/hashdb.py
@@ -33,6 +33,7 @@ class HashDB(object):
         self.filepath = filepath
         self._write_cache = {}
         self._cache_lock = threading.Lock()
+        self._connections = []
 
     def _get_cursor(self):
         threadData = getCurrentThreadData()
@@ -40,6 +41,7 @@ class HashDB(object):
         if threadData.hashDBCursor is None:
             try:
                 connection = sqlite3.connect(self.filepath, timeout=3, isolation_level=None)
+                self._connections.append(connection)
                 threadData.hashDBCursor = connection.cursor()
                 threadData.hashDBCursor.execute("CREATE TABLE IF NOT EXISTS storage (id INTEGER PRIMARY KEY, value TEXT)")
                 connection.commit()
@@ -66,6 +68,14 @@ class HashDB(object):
         except:
             pass
 
+    def closeAll(self):
+        for connection in self._connections:
+            try:
+                connection.commit()
+                connection.close()
+            except:
+                pass
+
     @staticmethod
     def hashKey(key):
         key = getBytes(key if isinstance(key, six.text_type) else repr(key), errors="xmlcharrefreplace")