Exhibit 4(zzzz)

                                  AMENDMENT TO

                               JANUS ASPEN SERIES

                             SUB-ADVISORY AGREEMENT

                JANUS ASPEN INTECH RISK-MANAGED GROWTH PORTFOLIO

     THIS AMENDMENT is made this 14th day of June, 2006, between JANUS CAPITAL
MANAGEMENT LLC, a Delaware limited liability company ("Janus"), and ENHANCED
INVESTMENT TECHNOLOGIES, LLC, a Delaware limited liability company ("INTECH").

                                   WITNESSETH

     WHEREAS, Janus and INTECH are parties to a Sub-Advisory Agreement on behalf
of Janus Aspen INTECH Risk-Managed Growth Portfolio (the "Fund"), a series of
Janus Aspen Series, a Delaware statutory trust (the "Trust"), dated July 1,
2004, as amended May 1, 2006 (the "Agreement");

     WHEREAS, the parties desire to amend the Agreement as set forth in greater
detail below;

     WHEREAS, pursuant to Section 11 of the Agreement, any amendment to the
Agreement is subject to approval by (i) a majority of the Trustees, including a
majority of the Trustees who are not interested persons (as that phrase is
defined in Section 2(a)(19) of the 1940 Act) of the Trust or Janus, INTECH or
their affiliates, and (ii) if required by applicable law, by the affirmative
vote of a majority of the outstanding voting securities of the Fund (as that
phrase is defined in Section 2(a)(42) of the 1940 Act);

     WHEREAS, the parties have obtained Trustee approval as set forth above, and
the parties agree that a shareholder vote is not required to amend the
Agreement; and

     WHEREAS, the effective date of the termination of the Agreement has been
changed to February 1, 2007;

     NOW, THEREFORE, in consideration of the premises and of the mutual
agreements set forth below, the parties agree to amend the Agreement as follows:

     1. Section 8 of the Agreement shall be deleted in its entirety and replaced
with the following:

          "8. Term. This Agreement shall become effective as of the date first
          set forth above and shall continue in effect until February 1, 2007,
          unless sooner terminated in accordance with its terms, and shall
          continue in effect from year to year thereafter only so long as such
          continuance is



          specifically approved at least annually by (a) the vote of a majority
          of the Trustees of the Trust who are not parties hereto or interested
          persons of the Trust, Janus or INTECH, cast in person at a meeting
          called for the purpose of voting on the approval of the terms of such
          renewal, and (b) either the Trustees of the Trust or the affirmative
          vote of a majority of the outstanding voting securities of the Fund.
          The annual approvals provided for herein shall be effective to
          continue this Agreement from year to year if given within a period
          beginning not more than ninety (90) days prior to February 1 of each
          applicable year, notwithstanding the fact that more than three hundred
          sixty-five (365) days may have elapsed since the date on which such
          approval was last given."

     2. The parties acknowledge that the Agreement, as amended, remains in full
force and effect as of the date of this Amendment, and that this Amendment,
together with the Agreement and any prior amendments, contains the entire
understanding and the full and complete agreement of the parties and supercedes
and replaces any prior understandings and agreements among the parties
respecting the subject matter hereof.

     3. This Amendment may be contemporaneously executed in two or more
counterparts, each of which shall be deemed an original but all of which
together shall constitute one and the same instrument.

     IN WITNESS WHEREOF, the parties have caused their duly authorized officers
to execute this Amendment as of the date first above written.

                                        JANUS CAPITAL MANAGEMENT LLC


                                        By: /s/ David R. Martin
                                            ------------------------------------
                                            David R. Martin
                                            Executive Vice President and
                                            Chief Financial Officer


                                        ENHANCED INVESTMENT TECHNOLOGIES, LLC


                                        By: /s/ Andrew J. Iseman
                                            ------------------------------------
                                        Name: Andrew J. Iseman
                                        Title: Senior Vice President