diff --git a/pkgs/development/ocaml-modules/camlpdf/default.nix b/pkgs/development/ocaml-modules/camlpdf/default.nix
index 1fcfcaffccdd..3c7bc709e3ce 100644
--- a/pkgs/development/ocaml-modules/camlpdf/default.nix
+++ b/pkgs/development/ocaml-modules/camlpdf/default.nix
@@ -4,17 +4,18 @@
   fetchFromGitHub,
   ocaml,
   findlib,
+  nix-update-script,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
-  version = "2.9";
+  version = "2.9.1";
   pname = "ocaml${ocaml.version}-camlpdf";
 
   src = fetchFromGitHub {
     owner = "johnwhitington";
     repo = "camlpdf";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-8xBna7GDFbFf48069/ct71uFxLJU0eBfKVRWDnyYocs=";
+    hash = "sha256-f3Bm64T27eiIzOY2nwdzMRH68VlyNp2jXpOPyBouSCs=";
   };
 
   nativeBuildInputs = [
@@ -28,11 +29,15 @@ stdenv.mkDerivation (finalAttrs: {
     mkdir -p $out/lib/ocaml/${ocaml.version}/site-lib/stublibs
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "OCaml library for reading, writing and modifying PDF files";
     homepage = "https://github.com/johnwhitington/camlpdf";
+    changelog = "https://github.com/johnwhitington/camlpdf/blob/${finalAttrs.src.rev}/Changes.txt";
     license = lib.licenses.lgpl21Plus;
     maintainers = with lib.maintainers; [ vbgl ];
+    teams = with lib.teams; [ ngi ];
     broken = lib.versionOlder ocaml.version "4.10";
   };
 })
diff --git a/pkgs/development/ocaml-modules/cpdf/default.nix b/pkgs/development/ocaml-modules/cpdf/default.nix
index 8c46a09ca583..7a311fe05718 100644
--- a/pkgs/development/ocaml-modules/cpdf/default.nix
+++ b/pkgs/development/ocaml-modules/cpdf/default.nix
@@ -5,17 +5,18 @@
   ocaml,
   findlib,
   camlpdf,
+  nix-update-script,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "ocaml${ocaml.version}-cpdf";
-  version = "2.9";
+  version = "2.9.1";
 
   src = fetchFromGitHub {
     owner = "johnwhitington";
     repo = "cpdf-source";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-b6fGKFM9Q2YxW8FoyewGNTkF9XBtjdq0Bur6KgVi5T4=";
+    hash = "sha256-P3CQwYp23URVBDcdnrRAg7gAsOMIifwraIcFSJh8pd0=";
   };
 
   nativeBuildInputs = [
@@ -35,11 +36,15 @@ stdenv.mkDerivation (finalAttrs: {
     cp cpdfmanual.pdf $out/share/doc/cpdf/
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "PDF Command Line Tools";
     homepage = "https://www.coherentpdf.com/";
+    changelog = "https://github.com/johnwhitington/cpdf-source/blob/${finalAttrs.src.rev}/Changes.txt";
     license = lib.licenses.agpl3Only;
-    maintainers = [ lib.maintainers.vbgl ];
+    maintainers = with lib.maintainers; [ vbgl ];
+    teams = with lib.teams; [ ngi ];
     mainProgram = "cpdf";
     inherit (ocaml.meta) platforms;
     broken = lib.versionOlder ocaml.version "4.10";