Baltimore-based Jos. A. Bank Clothiers Inc. on Friday tightened its poison pill requirements. This is Jos. A. Bank's latest move in its continuing takeover battle with Men's Wearhouse Inc.

According to New York Times, Jos. A. Bank had reduced the ownership threshold of its shareholder rights plan to 10% from 20%. This means that if Men's Wearhouse or any other unsolicited buyer acquires 10% of the Baltimore retailer, Jos. A. Bank will issue a large number of shares to existing shareholders.

The move will help fortify Jos. A. Bank against future takeover bids from larger rival Men's Warehouse. The Texas-based retailer in November made a $1.5 billion bid for Jos. A. Bank, the report said.

The two companies have been fighting to take each other over for months. In October, Men's Warehouse rejected its smaller rival's unsolicited $2.3 billion bid, putting its own 10% shareholder rights plan in place. In what's known as a Pac-Man maneuver, the company then turned the tables and tried to acquire Jos. A. Bank, NY Times wrote.