diff --git a/vendor/ppx_deriving_jsont/src/dune b/vendor/ppx_deriving_jsont/src/dune
index b794395..bea75da 100644
--- a/vendor/ppx_deriving_jsont/src/dune
+++ b/vendor/ppx_deriving_jsont/src/dune
@@ -2,7 +2,7 @@
  (name ppx_deriving_jsont)
  (public_name ppx_deriving_jsont)
  (synopsis "[@@deriving jsont]")
- (libraries ppxlib ppx_deriving.api)
+ (libraries ppxlib)
  (preprocess
   (pps ppxlib.metaquot))
  (ppx_runtime_libraries jsont)
diff --git a/vendor/ppx_deriving_jsont/src/ppx_deriving_jsont.ml b/vendor/ppx_deriving_jsont/src/ppx_deriving_jsont.ml
index 70932b1..cfe5968 100644
--- a/vendor/ppx_deriving_jsont/src/ppx_deriving_jsont.ml
+++ b/vendor/ppx_deriving_jsont/src/ppx_deriving_jsont.ml
@@ -77,7 +77,9 @@ let rec of_core_type (core_type : Parsetree.core_type) =
       [%expr Jsont.list [%e jsont]]
   | { ptyp_desc = Ptyp_constr ({ txt = lid; loc }, _args); _ } ->
       (* TODO: arguments ? quoting ? *)
-      Exp.ident (Loc.make ~loc (Ppx_deriving.mangle_lid (`Suffix "jsont") lid))
+      Exp.ident
+        (Loc.make ~loc
+           (Ppxlib.Expansion_helpers.mangle_lid (Suffix "jsont") lid))
   | ct ->
       let msg =
         Printf.sprintf "Not implemented: core_type %s"