*757 OPINION OF THE COURT

Todd Dinges pleaded guilty to possessing pornography depicting minors engaged in sexually explicit conduct, in violation of 18 U.S.C. § 2252(a)(4)(B), and to mail fraud in violation of 18 U.S.C. § 1341. The District Court sentenced him to forty-eight months’ imprisonment as to the child pornography charge, and to forty-eight months on the mail fraud charge, to be served concurrently. The sentences of imprisonment are to be followed by concurrent three-year periods of supervised release.

Dinges raises two arguments on appeal. First, he argues that United States Sentencing Guideline § 2G2.4 violates the separation of powers doctrine. Second, Ding-es maintains the District Court erred in granting an upward departure on the basis of his criminal history. We find both claims meritless.

As he did in the District Court, Dinges argues that, in authorizing a change in the method in which United States Sentencing Commission members are appointed, Congress violated the separation of powers doctrine. Specifically, he argues that the entire Sentencing Guidelines system is unconstitutional because the Feeney Amendment allows the President to appoint to the Sentencing Commission only members of the Executive Branch. Dinges maintains that this violates our constitutionally mandated separation of powers because it places control over indictment, prosecution, and sentencing in the hands of the Executive Branch. We reject this argument because the Sentencing Guidelines are now advisory instead of mandatory. Regardless, the District Court here specifically recognized that it had the authority to reject the application of U.S.S.G. § 2G2.4, but declined to do so.

Next, Dinges argues the District Court erred by granting the Government’s request for an upward departure based on his criminal history. The Government sought an upward departure pursuant to U.S.S.G. § 4A1.3, which advises that an upward departure may be warranted when “reliable information indicates that the defendant’s criminal history category substantially under-represents the seriousness of the defendant’s criminal history or the likelihood that the defendant will commit other crimes.” U.S.S.G. § 4A1.3. 1

Initially, Dinges’ criminal history category was III. The Government argued that Dinges’ prior criminal history was not adequately reflected in the guideline calculation and moved for an upward departure. The District Court agreed. The District Court pointed to Dinges’ eighteen prior convictions in three separate Pennsylvania counties as well as thirty-seven summary convictions before Pennsylvania district justices, all for check fraud, forgery and/or receiving stolen property. The District Court also determined that Dinges’ criminal history calculation did not reflect multiple occasions in which Dinges was found to be in possession of child pornography, including instances after Dinges was indicted. The District Court determined that, given these findings, Dinges’ criminal history was “grossly under-represented.” We see no basis for disturbing these findings.

Given this history, and the fact that Dinges was found in possession of child pornography even after being indicted for possession of such abhorrent media, the District Court determined that it was extremely likely that Dinges would commit *758 future crimes. Accordingly, the District Court exercised its discretion and increased the criminal category. Given our deferential review of the court’s sentence, and the record’s support for the enhancement, we conclude that the resulting sentence was reasonable.

For all of the above reasons, we will affirm the District Court’s judgment of sentence and conviction.