diff --git a/pkgs/development/ocaml-modules/csexp/default.nix b/pkgs/development/ocaml-modules/csexp/default.nix
index 4bb83019dc5..664d9a773ab 100644
--- a/pkgs/development/ocaml-modules/csexp/default.nix
+++ b/pkgs/development/ocaml-modules/csexp/default.nix
@@ -2,23 +2,24 @@
 
 buildDunePackage rec {
   pname = "csexp";
-  version = "1.4.0";
-
-  useDune2 = true;
-
-  minimumOCamlVersion = "4.02.3";
+  version = "1.5.1";
 
   src = fetchurl {
     url = "https://github.com/ocaml-dune/csexp/releases/download/${version}/csexp-${version}.tbz";
-    sha256 = "sha256-jj1vyofxAqEm3ui3KioNFG8QQ5xHIY38FJ1Rvz7fNk4=";
+    sha256 = "sha256-1gXkBl+pCliABEDvLzOi2TE5i/LCIGGorLffhFwKrAI=";
   };
 
-  propagatedBuildInputs = [ result ];
+  minimumOCamlVersion = "4.03";
+  useDune2 = true;
+
+  propagatedBuildInputs = [
+    result
+  ];
 
   meta = with lib; {
-    homepage = "https://github.com/ocaml-dune/csexp";
+    homepage = "https://github.com/ocaml-dune/csexp/";
     description = "Minimal support for Canonical S-expressions";
     license = licenses.mit;
-    maintainers = [ maintainers.marsam ];
+    maintainers = with maintainers; [ marsam ];
   };
 }