Moody's Investors Service has downgraded Dynagas' outlook to negative as it faces debt maturing next year.

The ratings agency revised it from stable as it expects Dynagas' leverage to deteriorate in 2018 and 2019 before stabilizing in 2020 while the company refinances a $250 million senior unsecured bond due 2019.

Moody's affirmed the corporate family rating of Dynagas LNG Partners at B3, a probability of default rating of B3-PD, and a senior secured bank credit facility rating of subsidiary Arctic LNG Carriers at B1.