MEMORANDUM**

California state prisoner Isadore Piper appeals pro se the district court’s denial of his 28 U.S.C. § 2254 petition for writ of habeas corpus. The district court granted a certificate of appealability (“COA”) on whether Piper’s 25-years-to-life sentence *626under California’s “three strikes” law constitutes cruel and unusual punishment. We dismiss this appeal.

In the opening brief Piper has made a second request to broaden the COA. Because Piper has failed to make a substantial showing that he has been denied a constitutional right with respect to any of his additional claims, we decline to broaden the COA. See 28 U.S.C. § 2253(c).

We lack jurisdiction to entertain this appeal because Piper expressly abandoned his contention that his sentence constitutes cruel and unusual punishment, the only issue encompassed in the COA. See Miller-El v. Cockrell, 537 U.S. 322, 336, 123 S.Ct. 1029, 154 L.Ed.2d 931 (2003); Hiivala v. Wood, 195 F.3d 1098, 1103 (9th Cir. 1999) (per curiam).

DISMISSED.