diff --git a/collects/mzlib/contract.ss b/collects/mzlib/contract.ss
index f69ba69..64d02c4 100644
--- a/collects/mzlib/contract.ss
+++ b/collects/mzlib/contract.ss
@@ -29,22 +29,22 @@
 ;; except the arrow contracts
 ;;
 
-(require scheme/private/contract-base
-         scheme/private/contract-misc
-         scheme/private/contract-provide
-         scheme/private/contract-guts
-         scheme/private/contract-ds
-         scheme/private/contract-opt
-         scheme/private/contract-basic-opters)
+(require scheme/contract/private/base
+         scheme/contract/private/misc
+         scheme/contract/private/provide
+         scheme/contract/private/guts
+         scheme/contract/private/ds
+         scheme/contract/private/opt
+         scheme/contract/private/basic-opters)
 
 (provide 
  opt/c define-opt/c ;(all-from "private/contract-opt.ss")
- (except-out (all-from-out scheme/private/contract-ds)
+ (except-out (all-from-out scheme/contract/private/ds)
              lazy-depth-to-look)
  
- (all-from-out scheme/private/contract-base)
- (all-from-out scheme/private/contract-provide)
- (except-out (all-from-out scheme/private/contract-misc)
+ (all-from-out scheme/contract/private/base)
+ (all-from-out scheme/contract/private/provide)
+ (except-out (all-from-out scheme/contract/private/misc)
              check-between/c
              string-len/c
              check-unary-between/c)
diff --git a/collects/mzlib/private/contract-arr-checks.ss b/collects/mzlib/private/contract-arr-checks.ss
index 57ac711..547d814 100644
--- a/collects/mzlib/private/contract-arr-checks.ss
+++ b/collects/mzlib/private/contract-arr-checks.ss
@@ -1,7 +1,7 @@
 #lang scheme/base
 
 (provide (all-defined-out))
-(require scheme/private/contract-guts)
+(require scheme/contract/private/guts)
 
 (define empty-case-lambda/c
   (flat-named-contract '(case->)
diff --git a/collects/mzlib/private/contract-arr-obj-helpers.ss b/collects/mzlib/private/contract-arr-obj-helpers.ss
index 3e4516f..9d4d980 100644
--- a/collects/mzlib/private/contract-arr-obj-helpers.ss
+++ b/collects/mzlib/private/contract-arr-obj-helpers.ss
@@ -4,7 +4,7 @@
 
 (require (for-syntax scheme/base))
 (require (for-template scheme/base)
-         (for-template scheme/private/contract-guts)
+         (for-template scheme/contract/private/guts)
          (for-template "contract-arr-checks.ss"))
 
 (provide make-/proc ->/h ->*/h ->d/h ->d*/h ->r/h 
diff --git a/collects/mzlib/private/contract-arrow.ss b/collects/mzlib/private/contract-arrow.ss
index 6937f9c..757622b 100644
--- a/collects/mzlib/private/contract-arrow.ss
+++ b/collects/mzlib/private/contract-arrow.ss
@@ -1,11 +1,11 @@
 #lang scheme/base
 
-(require scheme/private/contract-guts
-         scheme/private/contract-opt
+(require scheme/contract/private/guts
+         scheme/contract/private/opt
          "contract-arr-checks.ss")
 (require (for-syntax scheme/base)
-         (for-syntax scheme/private/contract-opt-guts)
-         (for-syntax scheme/private/contract-helpers)
+         (for-syntax scheme/contract/private/opt-guts)
+         (for-syntax scheme/contract/private/helpers)
          (for-syntax "contract-arr-obj-helpers.ss")
          (for-syntax syntax/stx)
          (for-syntax syntax/name))
diff --git a/collects/mzlib/private/contract-define.ss b/collects/mzlib/private/contract-define.ss
index 12891e1..9bc54bd 100644
--- a/collects/mzlib/private/contract-define.ss
+++ b/collects/mzlib/private/contract-define.ss
@@ -4,7 +4,7 @@
 
 (require (for-syntax scheme/base)
          (only-in scheme/contract contract)
-         (for-syntax (prefix-in a: scheme/private/contract-helpers)))
+         (for-syntax (prefix-in a: scheme/contract/private/helpers)))
 
 ;; First, we have the old define/contract implementation, which
 ;; is still used in mzlib/contract.
diff --git a/collects/mzlib/private/contract-object.ss b/collects/mzlib/private/contract-object.ss
index c98cabf..c0166dc 100644
--- a/collects/mzlib/private/contract-object.ss
+++ b/collects/mzlib/private/contract-object.ss
@@ -1,11 +1,11 @@
 #lang scheme/base
 (require "contract-arrow.ss"
-         scheme/private/contract-guts
+         scheme/contract/private/guts
          scheme/private/class-internal
          "contract-arr-checks.ss")
 
 (require (for-syntax scheme/base
-                     scheme/private/contract-helpers
+                     scheme/contract/private/helpers
                      "contract-arr-obj-helpers.ss"))
 
 (provide mixin-contract