or just drop it in boiling water for a few minutes . Pretty safe bet that you will get no infections from it either way you go since alcohol will stop most of the nasties any way , but not all of them . so boil or sanitize .
Also make sure you do not have a large i.e. 2 gallon head space if you can avoid it . No need in allowing more oxygen than you have to to be in that dry hop bucket .
do not dry hop too long as the aroma and flavor start to go away . I like a couple days and no more than a week