diff --git a/collects/tests/mzscheme/md5.ss b/collects/tests/mzscheme/md5.ss
index bde5be60f0..c563027182 100644
--- a/collects/tests/mzscheme/md5.ss
+++ b/collects/tests/mzscheme/md5.ss
@@ -3,7 +3,7 @@
 
 (Section 'md5)
 
-(require mzlib/md5)
+(require file/md5)
 
 (test #"d41d8cd98f00b204e9800998ecf8427e" md5 #"")
 (test #"0cc175b9c0f1b6a831c399e269772661" md5 #"a")
diff --git a/collects/tests/plot/run-tests.ss b/collects/tests/plot/run-tests.ss
index cf9f673ee5..5921e79505 100755
--- a/collects/tests/plot/run-tests.ss
+++ b/collects/tests/plot/run-tests.ss
@@ -3,7 +3,7 @@
 exec mred  "$0" "$@"
 |#
 #lang scheme
-(require plot mzlib/md5 scheme/runtime-path)
+(require plot file/md5 scheme/runtime-path)
 
 (define-runtime-path here "./")
 
diff --git a/collects/web-server/http/response.ss b/collects/web-server/http/response.ss
index 5eaa83b65b..189350c930 100644
--- a/collects/web-server/http/response.ss
+++ b/collects/web-server/http/response.ss
@@ -1,6 +1,6 @@
 #lang scheme/base
 (require mzlib/contract
-         mzlib/md5
+         file/md5
          mzlib/port
          mzlib/list
          mzlib/plt-match
diff --git a/collects/web-server/lang/labels.ss b/collects/web-server/lang/labels.ss
index 70cdd69b6f..eae8936536 100644
--- a/collects/web-server/lang/labels.ss
+++ b/collects/web-server/lang/labels.ss
@@ -1,5 +1,5 @@
 #lang scheme
-(require mzlib/md5)
+(require file/md5)
 (provide/contract
  [make-labeling (bytes? . -> . (-> symbol?))])