diff --git a/src/devices.ml b/src/devices.ml
index 4b3527b9..6a37b593 100644
--- a/src/devices.ml
+++ b/src/devices.ml
@@ -1,4 +1,4 @@
-let db_connection caqti_switch : (unit, Caqti_miou.connection) Vif.Device.device
+let db_connection caqti_switch : (unit, Caqti_miou.connection) Vifu.Device.device
     =
   let f () =
     let db_uri = Config.Exchangedb_postgres.config in
@@ -14,7 +14,7 @@ let db_connection caqti_switch : (unit, Caqti_miou.connection) Vif.Device.device
             conn)
   in
   let finally (module Conn : Caqti_miou.CONNECTION) = Conn.disconnect () in
-  Vif.Device.v ~name:"db_connection" ~finally [] f
+  Vifu.Device.v ~name:"db_connection" ~finally [] f
 
 let keys storage =
   let f (module Conn : Pg.CONN) () =
@@ -27,4 +27,4 @@ let keys storage =
     keys
   in
   let finally _key = () in
-  Vif.Device.v ~name:"keys" ~finally [ Vif.Device.value db_connection ] f
+  Vifu.Device.v ~name:"keys" ~finally [ Vifu.Device.value db_connection ] f
diff --git a/src/headers.ml b/src/headers.ml
index 6d4a64f7..97678517 100644
--- a/src/headers.ml
+++ b/src/headers.ml
@@ -9,7 +9,7 @@ let avail_languages_header_value =
 (* TODO better headers_lib
    Cohttp raises on invalid *)
 let select_mimetype headers =
-  let opt = Vif.Headers.get headers "accept" in
+  let opt = Vifu.Headers.get headers "accept" in
   Cohttp.Accept.media_ranges opt
   |> Cohttp.Accept.qsort
   |> List.find_map (fun (_q, (m, _p)) -> Assets.Mimetype.of_cohttp m)
@@ -18,7 +18,7 @@ let select_mimetype headers =
   | Some mime -> mime
 
 let select_language headers =
-  let opt = Vif.Headers.get headers "accept-language" in
+  let opt = Vifu.Headers.get headers "accept-language" in
   Cohttp.Accept.languages opt
   |> Cohttp.Accept.qsort
   |> List.map snd
@@ -28,7 +28,7 @@ let select_language headers =
   | Some lang -> lang
 
 let select_encoding headers =
-  let opt = Vif.Headers.get headers "accept-encoding" in
+  let opt = Vifu.Headers.get headers "accept-encoding" in
   Cohttp.Accept.encodings opt
   |> Cohttp.Accept.qsort
   |> List.map snd
diff --git a/src/mte.ml b/src/mte.ml
index 296319b0..55da93d9 100644
--- a/src/mte.ml
+++ b/src/mte.ml
@@ -14,17 +14,17 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>. *)
 
 let hello req _server _env =
-  let open Vif.Response in
+  let open Vifu.Response in
   let open Syntax in
   let* () = with_string req "Hello~~\n" in
   let* () = add ~field:"content-type" "text/plain" in
   respond `OK
 
 let routes =
-  let open Vif.Uri in
-  let open Vif.Route in
+  let open Vifu.Uri in
+  let open Vifu.Route in
   let get path = get (path /?? any) in
-  let post path jsont = post (Vif.Type.json_encoding jsont) (path /?? any) in
+  let post path jsont = post (Vifu.Type.json_encoding jsont) (path /?? any) in
   let v s = rel / s in
   let tos =
     [
@@ -133,9 +133,9 @@ let () =
   let env : Devices.env =
     { caqti_switch; db_uri= Config.Exchangedb_postgres.config }
   in
-  let devices = Vif.Devices.[ Devices.db_connection; Devices.keys ] in
-  let middlewares = Vif.Middlewares.[] in
+  let devices = Vifu.Devices.[ Devices.db_connection; Devices.keys ] in
+  let middlewares = Vifu.Middlewares.[] in
   Logs.info (fun m ->
       m ~tags:(Util.Log_reporter.detail "...") "Starting MTE server");
-  Vif.run ~cfg ~devices ~middlewares routes env
+  Vifu.run ~cfg ~devices ~middlewares routes env
   *)
diff --git a/src/mte_info.ml b/src/mte_info.ml
index 60c5bf59..9b7f13ab 100644
--- a/src/mte_info.ml
+++ b/src/mte_info.ml
@@ -7,9 +7,9 @@ module String_map = Stdlib.Map.Make (Stdlib.String)
    maybe don't use the same RNG-initialization as the one used to generate keys *)
 let seed req _server _env =
   Logs.info (fun m -> m "GET /seed");
-  (* RNG is initialized by Vif.run *)
+  (* RNG is initialized by Vifu.run *)
   let s = Mirage_crypto_rng.generate 64 in
-  let open Vif.Response in
+  let open Vifu.Response in
   let open Syntax in
   let* () = add ~field:"content-type" "application/octet-stream" in
   let* () = with_string req s in
@@ -158,11 +158,11 @@ let jsont = ExchangeKeysResponse.jsont
 
 let keys req server _env =
   Logs.info (fun m -> m "GET /keys");
-  let db_conn = Vif.Server.device Devices.db_connection server in
-  let keys = Vif.Server.device Devices.keys server in
+  let db_conn = Vifu.Server.device Devices.db_connection server in
+  let keys = Vifu.Server.device Devices.keys server in
   let res =
     let* last_issue_date =
-      match Vif.Queries.get req "last_issue_date" with
+      match Vifu.Queries.get req "last_issue_date" with
       | [] -> Ok None
       | s :: _ -> (
           match Int64.of_string_opt s with
diff --git a/src/mte_management.ml b/src/mte_management.ml
index d289678f..b22331cc 100644
--- a/src/mte_management.ml
+++ b/src/mte_management.ml
@@ -7,7 +7,7 @@ module Keys_get = struct
 
   let f req server _env =
     Logs.info (fun m -> m "GET /management/keys/");
-    let (module Keys : Keys.S) = Vif.Server.device Devices.keys server in
+    let (module Keys : Keys.S) = Vifu.Server.device Devices.keys server in
     let res =
       let* v = Keys.make_future_keys_response () in
       Api.encode jsont v
@@ -31,9 +31,9 @@ module Keys_post = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/keys/");
-    let keys = Vif.Server.device Devices.keys server in
+    let keys = Vifu.Server.device Devices.keys server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ keys v in
       Ok ()
@@ -56,10 +56,10 @@ module Denom_revoke = struct
 
   let f req h_denom_pub server _env =
     Logs.info (fun m -> m "POST /management/denominations/$H_DENOM_PUB/revoke/");
-    let keys = Vif.Server.device Devices.keys server in
+    let keys = Vifu.Server.device Devices.keys server in
     let res =
       let* h_denom_pub = Crypto.DenominationHash.of_b32 h_denom_pub in
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys h_denom_pub v in
       let* () = do_ keys h_denom_pub v in
       Ok ()
@@ -82,10 +82,10 @@ module Signkey_revoke = struct
 
   let f req exchange_pub server _env =
     Logs.info (fun m -> m "POST /management/signkeys/$EXCHANGE_PUB/revoke/");
-    let keys = Vif.Server.device Devices.keys server in
+    let keys = Vifu.Server.device Devices.keys server in
     let res =
       let* exchange_pub = Crypto.EddsaPublicKey.of_b32 exchange_pub in
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys exchange_pub v in
       let* () = do_ keys exchange_pub v in
       Ok ()
@@ -133,10 +133,10 @@ module Auditors = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/auditors/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -178,11 +178,11 @@ module Auditors_disable = struct
 
   let f req auditor_pub server _env =
     Logs.info (fun m -> m "POST /management/auditors/$AUDITOR_PUB/disable/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
       let* auditor_pub = Crypto.EddsaPublicKey.of_b32 auditor_pub in
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys auditor_pub v in
       let* () = do_ ~db_conn auditor_pub v in
       Ok ()
@@ -238,10 +238,10 @@ module Wire_fee = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/wire-fee/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -284,9 +284,9 @@ module Global_fees = struct
      and once set for a timeframe, it should not change. *)
   let f req server _env =
     Logs.info (fun m -> m "POST /management/global-fees/");
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -399,10 +399,10 @@ module Wire = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/wire/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -438,10 +438,10 @@ module Wire_disable = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/wire/disable/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -487,10 +487,10 @@ module Drain = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/drain/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -527,10 +527,10 @@ module AmlOfficer = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/aml-officers/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
@@ -569,10 +569,10 @@ module Partners = struct
 
   let f req server _env =
     Logs.info (fun m -> m "POST /management/partners/");
-    let keys = Vif.Server.device Devices.keys server in
-    let db_conn = Vif.Server.device Devices.db_connection server in
+    let keys = Vifu.Server.device Devices.keys server in
+    let db_conn = Vifu.Server.device Devices.db_connection server in
     let res =
-      let* v = Vif.Request.of_json req |> unwrap_msg in
+      let* v = Vifu.Request.of_json req |> unwrap_msg in
       let* () = verify keys v in
       let* () = do_ ~db_conn v in
       Ok ()
diff --git a/src/mte_terms.ml b/src/mte_terms.ml
index 4dca972a..a055b5e4 100644
--- a/src/mte_terms.ml
+++ b/src/mte_terms.ml
@@ -2,9 +2,9 @@
 
 let aux asset req _server _env =
   let etag = Assets.etag asset in
-  let headers = Vif.Request.headers req in
+  let headers = Vifu.Request.headers req in
   let has_matching_etag =
-    match Vif.Headers.get headers "if-none-match" with
+    match Vifu.Headers.get headers "if-none-match" with
     | None -> Ok false
     | Some s ->
         Headers_lib.If_none_match.parse s
@@ -19,7 +19,7 @@ let aux asset req _server _env =
       let compression = Headers.select_encoding headers in
       let data = Assets.get_content ~mime ~lang asset in
       (* -- *)
-      let open Vif.Response in
+      let open Vifu.Response in
       let open Syntax in
       let* () = with_string ?compression req data in
       let* () =
diff --git a/src/respond.ml b/src/respond.ml
index a7780c36..60fb46a3 100644
--- a/src/respond.ml
+++ b/src/respond.ml
@@ -4,7 +4,7 @@ let encode_error_detail err =
   | Ok s -> s
 
 let respond_json req content status =
-  let open Vif.Response in
+  let open Vifu.Response in
   let open Syntax in
   let* () = add ~field:"content-type" "application/json" in
   let* () = with_string req content in
@@ -32,14 +32,14 @@ let ok content req =
 
 let no_content () =
   Logs.debug (fun m -> m "no content");
-  let open Vif.Response in
+  let open Vifu.Response in
   let open Syntax in
   let* () = empty in
   respond `No_content
 
 let not_modified () =
   Logs.debug (fun m -> m "not modified");
-  let open Vif.Response in
+  let open Vifu.Response in
   let open Syntax in
   let* () = empty in
   respond `Not_modified