Every year the NHL makes several changes to the rules that are voted on by each individual team. This year 4 rules were approved by the NHL's Board of Governors. One rule, in particular, was in response to actions taken by Toronto Maple Leafs goalie Matt Murray.
On the play, Matt Murray looks to intentionally run into the post with force knocking it off leading to a stoppage in play. This will now be enforced and blamed on the goaltender instead of giving them the benefit of the doubt.