diff --git a/pkgs/development/ocaml-modules/cohttp/default.nix b/pkgs/development/ocaml-modules/cohttp/default.nix
index e664d17f215..1cbc43bc280 100644
--- a/pkgs/development/ocaml-modules/cohttp/default.nix
+++ b/pkgs/development/ocaml-modules/cohttp/default.nix
@@ -1,11 +1,12 @@
 { lib, fetchurl, buildDunePackage
 , ppx_fields_conv, ppx_sexp_conv, stdlib-shims
 , base64, fieldslib, jsonm, re, stringext, uri-sexp
+, ocaml, fmt, alcotest
 }:
 
 buildDunePackage rec {
   pname = "cohttp";
-  version = "2.5.4";
+  version = "2.5.5";
 
   useDune2 = true;
 
@@ -13,13 +14,16 @@ buildDunePackage rec {
 
   src = fetchurl {
     url = "https://github.com/mirage/ocaml-cohttp/releases/download/v${version}/cohttp-v${version}.tbz";
-    sha256 = "1q04spmki5zis5p5m1vs77i3k7ijm134j62g61071vblwx25z17a";
+    sha256 = "0ywmql4lp6ps2gd064ixbjzsdnnn5vk3pipm005sswl553qqwaim";
   };
 
   buildInputs = [ jsonm ppx_fields_conv ppx_sexp_conv ];
 
   propagatedBuildInputs = [ base64 fieldslib re stringext uri-sexp stdlib-shims ];
 
+  doCheck = lib.versionAtLeast ocaml.version "4.05";
+  checkInputs = [ fmt alcotest ];
+
   meta = {
     description = "HTTP(S) library for Lwt, Async and Mirage";
     license = lib.licenses.isc;