diff --git a/pkgs/applications/science/chemistry/octopus/default.nix b/pkgs/applications/science/chemistry/octopus/default.nix
index 5fc71c9fc6b..4b580a6cf52 100644
--- a/pkgs/applications/science/chemistry/octopus/default.nix
+++ b/pkgs/applications/science/chemistry/octopus/default.nix
@@ -3,7 +3,7 @@
 }:
 
 let
-  version = "8.4";
+  version = "9.0";
   fftwAll = symlinkJoin { name ="ftw-dev-out"; paths = [ fftw.dev fftw.out ]; };
 
 in stdenv.mkDerivation {
@@ -11,7 +11,7 @@ in stdenv.mkDerivation {
 
   src = fetchurl {
     url = "http://www.tddft.org/programs/octopus/down.php?file=${version}/octopus-${version}.tar.gz";
-    sha256 = "1fx5ssnf65b9ld7xs9rvvg8i80pblxpyhqkir0a7xshkk1g60z55";
+    sha256 = "0p1gjykjnzm4m93mgjsmnxd0n2j381jk5kn3a7gkzxanixp60ilm";
   };
 
   nativeBuildInputs = [ perl procps fftw.dev ];