diff --git a/pkgs/development/ocaml-modules/io-page/default.nix b/pkgs/development/ocaml-modules/io-page/default.nix
index 25fa60139d6e..c883175f6e0f 100644
--- a/pkgs/development/ocaml-modules/io-page/default.nix
+++ b/pkgs/development/ocaml-modules/io-page/default.nix
@@ -1,13 +1,13 @@
 { stdenv, fetchzip, ocaml, findlib, cstruct }:
 
-let version = "1.4.0"; in
+let version = "1.5.1"; in
 
 stdenv.mkDerivation {
   name = "ocaml-io-page-${version}";
 
   src = fetchzip {
     url = "https://github.com/mirage/io-page/archive/v${version}.tar.gz";
-    sha256 = "05m1gbcy72i6gikdijbkpw8pfygc86a3l4k8ayyl58019l6qa2fq";
+    sha256 = "0y92wbvi129d0i7wr4lpk1ps9l247zaf1ibqqz0i6spgl28dyq79";
   };
 
   buildInputs = [ ocaml findlib ];