Lionel Parks, Sr., Louisiana prisoner # 067187, appeals the dismissal of an in forma pauperis (IFP) civil rights complaint alleging that he is wrongfully imprisoned because his conviction is invalid. The district court granted the defendants’ Fed. R.CivP. 12(b)(6) motion to dismiss because it determined that Parks’s claims are barred by Heck v. Humphrey, 512 U.S. 477, 114 S.Ct. 2364, 129 L.Ed.2d 383 (1994). We review this determination de novo. See In re Katrina Canal Breaches Litigation, 495 F.3d 191, 205 (5th Cir. 2007), cert. denied, — U.S.—, 128 S.Ct. 1230, 170 L.Ed.2d 63 (2008).

Parks’s claims concerning his conviction are barred by Heck because he has failed to establish that the conviction has been reversed, expunged, or otherwise invalidated. See Heck, 512 U.S. at 486-87, 114 S.Ct. 2364. Thus, the appeal is without arguable merit and is frivolous. See Howard v. King, 707 F.2d 215, 219-20 (5th Cir. 1983). Because the appeal is frivolous, it is dismissed. See 5th Cir. R. 42.2.

The district court’s dismissal of the complaint for failure to state a claim for relief and our dismissal of this appeal as frivolous count as strikes for purposes of 28 U.S.C. § 1915(g). See Adepegba v. Hammons, 103 F.3d 383, 388 (5th Cir. 1996). Parks is warned that if he accumulates three strikes, he will be barred from proceeding IFP in any civil action or appeal filed while he is incarcerated or detained in any facility unless he is under imminent danger of serious physical injury. See § 1915(g).

APPEAL DISMISSED; SANCTION WARNING ISSUED.