Exhibit 4.6B

                        SUPPLEMENT TO SECURITY AGREEMENT


            This  SUPPLEMENT  TO  SECURITY  AGREEMENT,  dated  June 16,  2004 is
delivered by the  undersigned  in favor of U.S.  Bank National  Association,  as
Trustee  (together  with any  successor  Trustee  pursuant  to the  terms of the
Indenture,  the "SECURED PARTY"), acting in the capacity of collateral agent for
the  benefit  of itself and the  Holders,  pursuant  to the Pledge and  Security
Agreement,  dated as of April 16, 2004 (as it may be from time to time  amended,
restated, modified or supplemented, the "SECURITY AGREEMENT"), among Diamond Jo,
LLC, a Delaware  limited  liability  company  ("DJL"),  The Old Evangeline Downs
Capital Corp., a Delaware  corporation  ("CAPITAL"  and,  together with DJL, the
"ISSUERS"), OED Acquisition, LLC, a Delaware limited liability company ("OEDA"),
Peninsula  Gaming  Corporation,  a Delaware  corporation  ("PG CORP."),  The Old
Evangeline Downs,  L.L.C., a Louisiana  limited  liability company ("OED"),  and
each additional  Guarantor (as defined in the Indenture referred to therein) and
Issuer (as defined in the Indenture) from time to time party thereto pursuant to
Section 5.2 thereof,  and the Secured Party.  Capitalized  terms used herein not
otherwise  defined  herein  shall  have the  meanings  ascribed  thereto  in the
Security Agreement.

            The  undersigned  does hereby grant to the Secured  Party a security
interest in, all of the  undersigned's  right,  title and interest in and to all
Collateral to secure the Secured  Obligations of the  undersigned,  in each case
whether  now or  hereafter  existing  or in  which  the  undersigned  now has or
hereafter  acquires  an  interest  and  wherever  the same may be  located.  The
undersigned  hereby further  agrees,  as of the date first written above,  to be
bound  by all  of the  terms  and  provisions  of  the  Security  Agreement,  as
supplemented by this Supplement to Security  Agreement.  The undersigned  hereby
makes  all of the  representations  and  warranties  set  forth in the  Security
Agreement,  and hereby represents and warrants that the attached  supplements to
Schedules  accurately and completely set forth all information required pursuant
to the Security  Agreement and hereby agrees that such  Supplements to Schedules
shall constitute part of the schedules to the Security Agreement.

            IN WITNESS  WHEREOF,  the  undersigned has caused this Supplement to
Security  Agreement  to be duly  executed and  delivered by its duly  authorized
officer.

                                               PENINSULA GAMING, LLC


                                               By:/s/M. BRENT STEVENS
                                                  ------------------------------
                                                  Name:  M. Brent Stevens
                                                  Title: Chief Executive Officer

ACCEPTED AND AGREED TO BY:
U.S. BANK NATIONAL ASSOCIATION,
   as Trustee, as Secured Party

By: /s/FRANK P. LESLIE, II
   ----------------------------
   Name:  Frank P. Leslie, II
   Title: Vice President