diff --git a/collects/profile/analyzer.rkt b/collects/profile/analyzer.rkt
index e114c4e..63880af 100644
--- a/collects/profile/analyzer.rkt
+++ b/collects/profile/analyzer.rkt
@@ -1,10 +1,10 @@
-#lang scheme/base
+#lang racket/base
 
 ;; Analyzer for the sampler results
 
 (provide analyze-samples)
 
-(require "structs.rkt" "utils.rkt" scheme/list)
+(require "structs.rkt" "utils.rkt" racket/list)
 
 (define-syntax-rule (with-hash <hash> <key> <expr>)
   (hash-ref! <hash> <key> (lambda () <expr>)))
diff --git a/collects/profile/main.rkt b/collects/profile/main.rkt
index af10381..be53d1b 100644
--- a/collects/profile/main.rkt
+++ b/collects/profile/main.rkt
@@ -1,10 +1,10 @@
-#lang scheme/base
+#lang racket/base
 
 (provide profile-thunk profile)
 
 (require "sampler.rkt" "analyzer.rkt"
          (prefix-in text: "render-text.rkt")
-         (for-syntax scheme/base))
+         (for-syntax racket/base))
 
 (define (profile-thunk thunk
                        #:delay   [delay 0.05]
diff --git a/collects/profile/render-graphviz.rkt b/collects/profile/render-graphviz.rkt
index 1aba7ce..8e063df 100644
--- a/collects/profile/render-graphviz.rkt
+++ b/collects/profile/render-graphviz.rkt
@@ -1,4 +1,4 @@
-#lang scheme/base
+#lang racket/base
 
 (provide render)
 
diff --git a/collects/profile/render-text.rkt b/collects/profile/render-text.rkt
index a0952fc..a6c6abe 100644
--- a/collects/profile/render-text.rkt
+++ b/collects/profile/render-text.rkt
@@ -1,8 +1,8 @@
-#lang at-exp scheme/base
+#lang at-exp racket/base
 
 (provide render)
 
-(require "structs.rkt" "analyzer.rkt" "utils.rkt" scheme/list)
+(require "structs.rkt" "analyzer.rkt" "utils.rkt" racket/list)
 
 (define (f:msec msec)
   (number->string (round (inexact->exact msec))))
diff --git a/collects/profile/sampler.rkt b/collects/profile/sampler.rkt
index 7529135..9dadc6b 100644
--- a/collects/profile/sampler.rkt
+++ b/collects/profile/sampler.rkt
@@ -1,4 +1,4 @@
-#lang scheme/base
+#lang racket/base
 
 ;; The core profiler sample collector
 ;; (This module is a private tool for collecting profiling data, and should not
diff --git a/collects/profile/structs.rkt b/collects/profile/structs.rkt
index 9732e7c..7ecbeff 100644
--- a/collects/profile/structs.rkt
+++ b/collects/profile/structs.rkt
@@ -1,4 +1,4 @@
-#lang scheme/base
+#lang racket/base
 
 ;; Struct definitions for the profiler
 
diff --git a/collects/profile/utils.rkt b/collects/profile/utils.rkt
index 7486ce3..8b9430e 100644
--- a/collects/profile/utils.rkt
+++ b/collects/profile/utils.rkt
@@ -1,6 +1,6 @@
-#lang scheme/base
+#lang racket/base
 
-(require "structs.rkt" scheme/list scheme/nest)
+(require "structs.rkt" racket/list)
 
 ;; Format a percent number, possibly doing the division too.  If we do the
 ;; division, then be careful: if we're dividing by zero, then make the result