SUMMARY ORDER

Defendant-Appellant’s notice of appeal was untimely under Federal Rule of Appellate Procedure 4(b), which provides that “the district court may ... extend the time to file a notice of appeal for a period not to exceed 30 days from the expiration of the time otherwise prescribed by this Rule 4(b).” Fed. R. App. P. 4(b)(4). The district court extended Russow’s time to file a notice of appeal, but Russow did not file his notice of appeal until 13 days after the expiration of his extended time. 1 Although “Rule 4(b) is not jurisdictional,” we have made clear that “[w]hen the government properly objects to the untimeliness of a defendant’s criminal appeal, Rule 4(b) is mandatory and inflexible.” United States v. Frias, 521 F.3d 229, 234 (2d Cir. 2008). In its brief, the government objected to Rus-sow’s failure to comply with Rule 4(b)’s mandatory time limits. Accordingly, this appeal is DISMISSED as untimely.