diff -Nru ppx-sexp-conv-0.14.1/CHANGES.md ppx-sexp-conv-0.14.3/CHANGES.md
--- ppx-sexp-conv-0.14.1/CHANGES.md	2020-08-27 16:24:36.000000000 +0000
+++ ppx-sexp-conv-0.14.3/CHANGES.md	2021-02-18 14:45:04.000000000 +0000
@@ -1,3 +1,7 @@
+## v0.14.2
+
+- Upgrade to ppxlib 0.18.0
+
 ## v0.14.1
 
 - Depend on ppxlib >= v0.15.0.
diff -Nru ppx-sexp-conv-0.14.1/debian/changelog ppx-sexp-conv-0.14.3/debian/changelog
--- ppx-sexp-conv-0.14.1/debian/changelog	2021-12-09 02:19:45.000000000 +0000
+++ ppx-sexp-conv-0.14.3/debian/changelog	2022-01-25 13:42:29.000000000 +0000
@@ -1,14 +1,16 @@
-ppx-sexp-conv (1:0.14.1-1build2) jammy; urgency=medium
+ppx-sexp-conv (1:0.14.3-1build1) jammy; urgency=medium
 
-  * No-change rebuild for current ocaml ABIs
+  * No-change rebuild for ocaml abi changes.
 
- -- Steve Langasek <steve.langasek@ubuntu.com>  Thu, 09 Dec 2021 02:19:45 +0000
+ -- Matthias Klose <doko@ubuntu.com>  Tue, 25 Jan 2022 14:42:29 +0100
 
-ppx-sexp-conv (1:0.14.1-1build1) hirsute; urgency=medium
+ppx-sexp-conv (1:0.14.3-1) unstable; urgency=medium
 
-  * No-change rebuild for ocaml abi changes.
+  * New upstream release
+  * Bump Standards-Version to 4.6.0
+  * Update debian/watch
 
- -- Matthias Klose <doko@ubuntu.com>  Sun, 13 Dec 2020 11:53:11 +0100
+ -- Stéphane Glondu <glondu@debian.org>  Fri, 21 Jan 2022 00:30:39 +0100
 
 ppx-sexp-conv (1:0.14.1-1) unstable; urgency=medium
 
diff -Nru ppx-sexp-conv-0.14.1/debian/control ppx-sexp-conv-0.14.3/debian/control
--- ppx-sexp-conv-0.14.1/debian/control	2021-12-09 02:19:45.000000000 +0000
+++ ppx-sexp-conv-0.14.3/debian/control	2022-01-20 23:30:39.000000000 +0000
@@ -1,19 +1,18 @@
 Source: ppx-sexp-conv
 Section: ocaml
 Priority: optional
-Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
-XSBC-Original-Maintainer: Debian OCaml Maintainers <debian-ocaml-maint@lists.debian.org>
+Maintainer: Debian OCaml Maintainers <debian-ocaml-maint@lists.debian.org>
 Uploaders: Stéphane Glondu <glondu@debian.org>
 Build-Depends:
  debhelper-compat (= 13),
- ocaml-nox,
+ ocaml,
  ocaml-findlib,
  ocaml-dune,
  libbase-ocaml-dev (>= 0.14),
  libsexplib0-ocaml-dev (>= 0.14),
- libppxlib-ocaml-dev (>= 0.15.0),
+ libppxlib-ocaml-dev (>= 0.22.0),
  dh-ocaml
-Standards-Version: 4.5.0
+Standards-Version: 4.6.0
 Rules-Requires-Root: no
 Vcs-Browser: https://salsa.debian.org/ocaml-team/ppx-sexp-conv
 Vcs-Git: https://salsa.debian.org/ocaml-team/ppx-sexp-conv.git
diff -Nru ppx-sexp-conv-0.14.1/debian/watch ppx-sexp-conv-0.14.3/debian/watch
--- ppx-sexp-conv-0.14.1/debian/watch	2020-11-09 03:24:50.000000000 +0000
+++ ppx-sexp-conv-0.14.3/debian/watch	2022-01-20 23:30:39.000000000 +0000
@@ -1,2 +1,2 @@
-version=3
-opts=uversionmangle=s/-rc/~rc/ https://github.com/janestreet/ppx_sexp_conv/tags /.*/archive/v([\d\.\-rc]+)\.tar\.gz
+version=4
+opts=uversionmangle=s/-rc/~rc/ https://github.com/janestreet/ppx_sexp_conv/tags .*/v?([\d\.\-rc]+)\.tar\.gz
diff -Nru ppx-sexp-conv-0.14.1/expander/sexp_grammar_lifter.ml ppx-sexp-conv-0.14.3/expander/sexp_grammar_lifter.ml
--- ppx-sexp-conv-0.14.1/expander/sexp_grammar_lifter.ml	2020-08-27 16:24:36.000000000 +0000
+++ ppx-sexp-conv-0.14.3/expander/sexp_grammar_lifter.ml	2021-02-18 14:45:04.000000000 +0000
@@ -28,7 +28,7 @@
 type var_name  = Sexp.Private.Raw_grammar.var_name
 type type_name = Sexp.Private.Raw_grammar.type_name
 
-let lift_string ~loc s = pexp_constant ~loc (Pconst_string (s, None))
+let lift_string ~loc s = pexp_constant ~loc (Pconst_string (s, loc, None))
 let lift_var_name      = lift_string
 let lift_type_name     = lift_string
 
diff -Nru ppx-sexp-conv-0.14.1/expander/str_generate_sexp_grammar.ml ppx-sexp-conv-0.14.3/expander/str_generate_sexp_grammar.ml
--- ppx-sexp-conv-0.14.1/expander/str_generate_sexp_grammar.ml	2020-08-27 16:24:36.000000000 +0000
+++ ppx-sexp-conv-0.14.3/expander/str_generate_sexp_grammar.ml	2021-02-18 14:45:04.000000000 +0000
@@ -604,7 +604,7 @@
     let type_variables, core_type =
       collect_type_variables_of_polymorphic_grammar core_type
     in
-    ( List.map type_variables ~f:(fun var_name -> ptyp_var ~loc var_name, Invariant)
+    ( List.map type_variables ~f:(fun var_name -> ptyp_var ~loc var_name, (NoVariance, NoInjectivity))
     , core_type )
   in
   let td =
diff -Nru ppx-sexp-conv-0.14.1/ppx_sexp_conv.opam ppx-sexp-conv-0.14.3/ppx_sexp_conv.opam
--- ppx-sexp-conv-0.14.1/ppx_sexp_conv.opam	2020-08-27 16:24:36.000000000 +0000
+++ ppx-sexp-conv-0.14.3/ppx_sexp_conv.opam	2021-02-18 14:45:04.000000000 +0000
@@ -15,7 +15,7 @@
   "base"     {>= "v0.14" & < "v0.15"}
   "sexplib0" {>= "v0.14" & < "v0.15"}
   "dune"     {>= "2.0.0"}
-  "ppxlib"   {>= "0.11.0"}
+  "ppxlib"   {>= "0.22.0"}
 ]
 synopsis: "[@@deriving] plugin to generate S-expression conversion functions"
 description: "