Shrewsbury kept alive their play-off hopes alive, with a 1-0 win against Carlisle but they made hard work of it.
Carlisle were reduced to 10 men when midfielder Peter Murphy was red-carded after 21 minutes.
Carlisle keeper Peter Keen made a string of brilliant saves before he was finally beaten by Ryan Lowe's 38th-minute shot from the edge of the penalty box.
Shrewsbury were denied further goals when shots from Lowe and Ian Woan came off the woodwork.