diff --git a/pkgs/development/ocaml-modules/janestreet/0.15.nix b/pkgs/development/ocaml-modules/janestreet/0.15.nix
index 019afdbe09c3..5d79b458dddc 100644
--- a/pkgs/development/ocaml-modules/janestreet/0.15.nix
+++ b/pkgs/development/ocaml-modules/janestreet/0.15.nix
@@ -904,7 +904,8 @@ with self;
 
   sexp_pretty = janePackage {
     pname = "sexp_pretty";
-    hash = "1p1jspwjvrhm8li22xl0n8wngs12d9g7nc1svk6xc32jralnxblg";
+    version = "0.15.1";
+    hash = "sha256-UJEO2P4C7ZaD110MEfkG4FXfGDVAAW2TAK489faV6SM=";
     minimumOCamlVersion = "4.07";
     meta.description = "S-expression pretty-printer";
     propagatedBuildInputs = [ ppx_base re sexplib ];