diff --git a/pkgs/development/ocaml-modules/topkg/default.nix b/pkgs/development/ocaml-modules/topkg/default.nix
index 23bcc267066..f343eed6b46 100644
--- a/pkgs/development/ocaml-modules/topkg/default.nix
+++ b/pkgs/development/ocaml-modules/topkg/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "ocaml${ocaml.version}-topkg-${version}";
-  version = "0.7.8";
+  version = "0.8.1";
 
   src = fetchurl {
     url = "http://erratique.ch/software/topkg/releases/topkg-${version}.tbz";
-    sha256 = "029lbmabczpmcgkj53mc20vmpcn3f7rf7xms4xf0nywswfzsash6";
+    sha256 = "18rrh6fmf708z7dd30amljmcgaypj3kk49jrmrj68r4wnw8004j8";
   };
 
   nativeBuildInputs = [ opam ];