diff --git a/pkgs/development/ocaml-modules/camlpdf/default.nix b/pkgs/development/ocaml-modules/camlpdf/default.nix
index dad901ba9c10..7f4cbe4cf5cc 100644
--- a/pkgs/development/ocaml-modules/camlpdf/default.nix
+++ b/pkgs/development/ocaml-modules/camlpdf/default.nix
@@ -5,14 +5,14 @@ then throw "camlpdf is not available for OCaml ${ocaml.version}"
 else
 
 stdenv.mkDerivation rec {
-  version = "2.7";
+  version = "2.7.1";
   pname = "ocaml${ocaml.version}-camlpdf";
 
   src = fetchFromGitHub {
     owner = "johnwhitington";
     repo = "camlpdf";
     rev = "v${version}";
-    hash = "sha256-SVmLWffB7GF+Bu0tj5fIvQVMRh6uV3u2G3rC4cVH2Gw=";
+    hash = "sha256-/ZKL80HqLZ9ObOvgfg+ZHFZ8m2CRe0zWT8zHIf9CXes=";
   };
 
   nativeBuildInputs = [ which ocaml findlib ];
diff --git a/pkgs/development/ocaml-modules/cpdf/default.nix b/pkgs/development/ocaml-modules/cpdf/default.nix
index 30167f1c2ae2..0172efcc66a3 100644
--- a/pkgs/development/ocaml-modules/cpdf/default.nix
+++ b/pkgs/development/ocaml-modules/cpdf/default.nix
@@ -6,13 +6,13 @@ else
 
 stdenv.mkDerivation rec {
   pname = "ocaml${ocaml.version}-cpdf";
-  version = "2.7";
+  version = "2.7.1";
 
   src = fetchFromGitHub {
     owner = "johnwhitington";
     repo = "cpdf-source";
     rev = "v${version}";
-    hash = "sha256-Tm+xvL2HNdQsD04I9eR9tLL0bs5Ls2q+IndLV/p9sHs=";
+    hash = "sha256-lFI7f1t70Pw0LJjDrhaB7yQKR1N5906xNYB+fnrz55M=";
   };
 
   nativeBuildInputs = [ ocaml findlib ];
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "PDF Command Line Tools";
     homepage = "https://www.coherentpdf.com/";
-    license = licenses.unfree;
+    license = licenses.agpl3Only;
     maintainers = [ maintainers.vbgl ];
     mainProgram = "cpdf";
     inherit (ocaml.meta) platforms;