diff --git a/collects/handin-server/checker.rkt b/collects/handin-server/checker.rkt
index 079dc29103..7b41398e59 100644
--- a/collects/handin-server/checker.rkt
+++ b/collects/handin-server/checker.rkt
@@ -379,7 +379,7 @@
                   #''("Maximum points for this assignment: <+100>"))]
             [value-printer* (get ':value-printer #'#f)]
             [coverage?*     (get ':coverage?     #'#f)]
-            [output*        (get ':output        #'"hw.scm")]
+            [output*        (get ':output        #'"hw.rkt")]
             [multi-file*    (get ':multi-file    #'#f)]
             [names-checker* (get ':names-checker #'#f)]
             [user-error-message*
diff --git a/collects/handin-server/private/config.rkt b/collects/handin-server/private/config.rkt
index d0e44b30dd..74f3a03be0 100644
--- a/collects/handin-server/private/config.rkt
+++ b/collects/handin-server/private/config.rkt
@@ -74,7 +74,7 @@
     [(hook-file)               (values #f                    path/false   )]
     [(session-timeout)         (values 300                   id           )]
     [(session-memory-limit)    (values 40000000              id           )]
-    [(default-file-name)       (values "handin.scm"          id           )]
+    [(default-file-name)       (values "handin.rkt"          id           )]
     [(max-upload)              (values 500000                id           )]
     [(max-upload-keep)         (values 9                     id           )]
     [(user-regexp)             (values #rx"^[a-z][a-z0-9]+$" rx           )]
diff --git a/collects/handin-server/scribblings/checker.scrbl b/collects/handin-server/scribblings/checker.scrbl
index 250a610970..5615bff470 100644
--- a/collects/handin-server/scribblings/checker.scrbl
+++ b/collects/handin-server/scribblings/checker.scrbl
@@ -127,7 +127,7 @@ Keywords for configuring @scheme[check:]:
 
 @item{@indexed-scheme[:output]---the name of the original handin file
   (unrelated to the text-converted files).  Defaults to
-  @filepath{hw.scm}.  (The suffix changes the defaults of
+  @filepath{hw.rkt}.  (The suffix changes the defaults of
   @scheme[:markup-prefix] and @scheme[:prefix-re].)  Can be
   @scheme[#f] for removing the original file after processing.  The
   file is always stored in GRacket's binary format.}
@@ -243,9 +243,9 @@ code.}
     (require net/sendmail)
     (post:
       (define info
-        (format "hw.scm: ~a ~a"
-                (file-size "hw.scm")
-                (file-or-directory-modify-seconds "hw.scm")))
+        (format "hw.rkt: ~a ~a"
+                (file-size "hw.rkt")
+                (file-or-directory-modify-seconds "hw.rkt")))
       (timeout-control 'disable)
       (log-line "Sending a receipt: ~a" info)
       (send-mail-message