Gastar Exploration Inc. (NYSE MKT: GST) increased the borrowing base under its revolving credit facility to $120 million, the company said March 27.

The new amount represents a $20 million increase over the December 2013 borrowing base, Gastar said.

The credit facility currently has no outstanding borrowings, the company added.

Houston-based Gastar Exploration Inc. explores, develops and produces domestic oil, natural gas, NGL and condensate.