Cicero Fred Jackson, federal prisoner # 26054-177, pleaded guilty to distribution of cocaine base. Jackson now appeals the district court’s denial of his 18 U.S.C. § 3582(c)(2) motion. This court reviews a district court’s refusal to lower a defendant’s sentence under § 3582(c)(2) for abuse of discretion. United States v. Shaw, 30 F.3d 26, 28 (5th Cir. 1994).

Jackson’s contention that his sentence is subject to modification in light of United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), is without merit. Section 3582(c)(2) is inapplicable because Booker did not involve a retroactive amendment to the Sentencing Guidelines by the Sentencing Commission. See Shaw, 30 F.3d at 28; § 3582(c)(2).

Jackson’s appeal is dismissed as frivolous. See 5th Cir. R. 42.2; Howard v. King, 707 F.2d 215, 219-20 (5th Cir. 1983). We caution Jackson that further frivolous filings may result in the imposition of sanctions, including dismissal, monetary penalties, and restrictions on his ability to file appeals in this court and actions in any court subject to this court’s jurisdiction.

APPEAL DISMISSED; SANCTION WARNING ISSUED.