diff --git a/bitbake/lib/prserv/db.py b/bitbake/lib/prserv/db.py
index 9d8e9db9f2..7d74327c55 100644
--- a/bitbake/lib/prserv/db.py
+++ b/bitbake/lib/prserv/db.py
@@ -14,7 +14,7 @@ sqlversion = sqlite3.sqlite_version_info
 if sqlversion[0] < 3 or (sqlversion[0] == 3 and sqlversion[1] < 3):
     raise Exception("sqlite3 version 3.3.0 or later is required.")
 
-class PRTable():
+class PRTable(object):
     def __init__(self, conn, table, nohist):
         self.conn = conn
         self.nohist = nohist
@@ -223,7 +223,7 @@ class PRData(object):
         except OSError as e:
             if e.errno != errno.EEXIST:
                 raise e
-        self.connection=sqlite3.connect(self.filename, isolation_level="DEFERRED")
+        self.connection=sqlite3.connect(self.filename, isolation_level="DEFERRED", check_same_thread = False)
         self.connection.row_factory=sqlite3.Row
         self._tables={}
 
diff --git a/bitbake/lib/prserv/serv.py b/bitbake/lib/prserv/serv.py
index 6d0c7188ee..d6f3f44b04 100644
--- a/bitbake/lib/prserv/serv.py
+++ b/bitbake/lib/prserv/serv.py
@@ -165,7 +165,7 @@ class PRServer(SimpleXMLRPCServer):
         self.delpid()
         os._exit(0)
 
-class PRServSingleton():
+class PRServSingleton(object):
     def __init__(self, dbfile, logfile, interface):
         self.dbfile = dbfile
         self.logfile = logfile
@@ -182,7 +182,7 @@ class PRServSingleton():
     def getinfo(self):
         return (self.host, self.port)
 
-class PRServerConnection():
+class PRServerConnection(object):
     def __init__(self, host, port):
         if is_local_special(host, port):
             host, port = singleton.getinfo()