diff --git a/benchpress-server.opam b/benchpress-server.opam
index 21f02a2..aef84f2 100644
--- a/benchpress-server.opam
+++ b/benchpress-server.opam
@@ -21,7 +21,7 @@ depends: [
   "gnuplot" { >= "0.6" & < "0.8" }
   "sqlite3"
   "sqlite3_utils" { >= "0.4" & < "0.5" }
-  "tiny_httpd" { >= "0.16" & < "1.0" }
+  "tiny_httpd" { >= "0.17" & < "1.0" }
   "printbox" { >= "0.6" }
   "printbox-text" { >= "0.6" }
   "ocaml" {>= "4.12" }
diff --git a/src/server/benchpress_server.ml b/src/server/benchpress_server.ml
index e0c53e9..0a9dba9 100644
--- a/src/server/benchpress_server.ml
+++ b/src/server/benchpress_server.ml
@@ -2,7 +2,7 @@
 open Common
 module T = Test
 module H = Tiny_httpd
-module U = Tiny_httpd_util
+module U = Tiny_httpd.Util
 module PB = PrintBox
 module Log = (val Logs.src_log (Logs.Src.create "benchpress-serve"))
 
@@ -1746,9 +1746,9 @@ let handle_file self : unit =
       Log.debug (fun k -> k "get-file: `%s`" file);
       let bytes =
         if file = "prelude" then
-          H.Byte_stream.of_string Builtin_config.config (* magic file! *)
+          H.IO.Input.of_string Builtin_config.config (* magic file! *)
         else (
-          try H.Byte_stream.of_chan @@ open_in file
+          try H.IO.Input.of_in_channel @@ open_in file
           with e ->
             H.Response.fail_raise ~code:404
               "cannot open file %S:\n\