Marlin E. Jones appeals the district court’s 1 order dismissing his defamation action without prejudice for lack of subject matter jurisdiction. Upon de novo review, see Advance Am. Servicing of Ark., Inc. v. McGinnis, 526 F.3d 1170, 1173 (8th Cir. 2008), we agree with the district court that dismissal was proper because Jones failed to satisfy his burden of proving that the amount in controversy exceeded $75,000, after the court challenged the validity of the amount alleged, see 28 U.S.C. § 1332(a)(1); Missouri ex rel. Pemiscot County v. W. Sur. Co., 51 F.3d 170, 173 (8th Cir. 1995) (if opposing party or court questions whether alleged amount in controversy is legitimate, then party invoking federal diversity jurisdiction bears burden of establishing requisite amount by preponderance of evidence). Accordingly, we affirm. See 8th Cir. R. 47B.