Add "conn.text_factory = str" after connection creation in 
backends/back_sqlite.py:


        if sqlite_version == 1:
            conn = sqlite.connect(db=db)
            conn.db.sqlite_busy_handler(self.sqlite_busy_handler)
        else:
            conn = sqlite.connect(db, timeout=30)
            conn.row_factory = sqlite.Row
+           conn.text_factory = str
        cursor = conn.cursor()
        return (conn, cursor)