
    UNITED STATES of America v. Beatrice FOLK, Appellant.
    No. 04-3130.
    United States Court of Appeals, Third Circuit.
    Submitted Under Third Circuit LAR 34.1(a) May 11, 2006.
    Decided May 22, 2006.
    Joel D. Goldstein, Office of United States Attorney, Philadelphia, PA, for United States of America.
    Todd E. Henry, Philadelphia, PA, for Beatrice Folk.
    Before: BARRY, SMITH and TASHIMA, Circuit Judges.
    
      
       The Honorable A. Wallace Tashima, Senior Circuit Judge, United States Court of Appeals for the Ninth Circuit, sitting by designation.
    
   OPINION

BARRY, Circuit Judge.

Appellant Beatrice Folk pled guilty to conspiracy to possess methamphetamine with the intent to distribute and to the possession of methamphetamine with the intent to distribute. Prior to the Supreme Court’s decision in United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), Folk was sentenced by the United States District Court for the Eastern District of Pennsylvania to seventy months in prison, the low end of the applicable Guidelines range. She now appeals, challenging the legality of the sentence in light of Booker,

Applying the Supreme Court’s decision in Booker, this Court, in United States v. Davis, 407 F.3d 162 (3d Cir.2005), ruled that “[although plain error jurisprudence generally places the burden on an appellant to demonstrate specific prejudice flowing from the District Court’s error, in this context — where mandatory sentencing was governed by an erroneous scheme — prejudice can be presumed.” Id. at 165. The appellate remedy for such an error is to vacate the sentence and remand for resentencing under an advisory Guidelines framework. See id.

As part of her plea agreement, however, Folk “voluntarily and expressly waive[d] all rights to appeal” her sentence. We will enforce the waiver — the validity of which we review de novo — provided she “entered into [it] knowingly and voluntarily,” and so long as it does not “work a miscarriage of justice.” United States v. Khattak, 273 F.3d 557, 560 (3d Cir.2001). If valid, the waiver deprives us of jurisdiction over the appeal. See id. at 563. The government argues that we must enforce the waiver. We agree.

Our decision in United States v. Lockett, 406 F.3d 207 (3d Cir.2005) controls. There, we held “that where a criminal defendant has voluntarily and knowingly entered into a plea agreement in which he or she waives the right to appeal, the defendant is not entitled to resentencing in light of Booker.” Id. at 214. That the Supreme Court would invalidate the mandatory Guidelines regime was “merely one of the risks that accompanie[d]” Folk’s guilty plea and waiver of appeal. Id. (“The record reflects that Lockett knowingly and voluntarily bargained for his plea agreement. He cannot now ask to re-bargain the waiver of his right to appeal because of changes in the law.”). In short, the “favorable change in the law,” id., does not call into question the voluntary and knowing nature of Folk’s waiver of appeal. See Khattak, 273 F.3d at 561 (observing that “[w]aivers of the legal consequences of unknown future events are commonplace” and that their “prospective nature” does not “render a defendant’s act unknowing”) (citation and internal quotation marks omitted).

Consequently, we are without jurisdiction and will dismiss the appeal. 
      
      . Folk benefitted from application of the “safety valve” provision found in U.S.S.G. § 5C1.2, which permitted the District Court to sentence below the applicable statutory minimum sentence of 120 months.
     
      
      . Under Federal Rule of Appellate Procedure 4(b), a criminal defendant has ten days within which to file a notice of appeal from the later of the entry of the judgment or the filing of a government appeal. The judgment of sentence and commitment order was entered by the District Court on June 23, 2004, but Folk did not file her notice of appeal until July 23, 2004. On July 22, 2004, however, Folk filed an unopposed motion for an extension of time within which to file her notice of appeal. See Fed. R.App. P. 4(b)(4) ("Upon a finding of excusable neglect or good cause, the district court may — before or after the time has expired, with or without motion and notice— 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).”). On August 3, 2004, the District Court granted that motion nunc pro tunc through July 23, 2004. The appeal is, therefore, timely, and our jurisdiction over it arises under 28 U.S.C. § 1291 and 18 U.S.C. § 3742.
     
      
      . Folk also argues that the District Court erred in refusing to grant her a downward departure based upon familial circumstances.
     
      
      . There were two exceptions to the waiver, neither of which is applicable here.
     
      
      . Nor does enforcement of the waiver, and the concomitant preservation of Folk’s sentence at the low end of the then-mandatory Guidelines range, work "a miscarriage of justice.” Folk contends the District Court would have imposed a lighter sentence but for the mandatory Guidelines. The District Court did, in fact, note its "limited discretion” to depart from the Guidelines and described this as a "very sad case.” Those statements, at best, would only help Folk "demonstrate specific prejudice flowing from the District Court’s error,” Davis, 407 F.3d at 165. Pursuant to Davis, however, such prejudice is presumed, id., and does not on its own, according to Lockett, render a waiver of appeal unenforceable.
     