diff --git a/pkgs/development/libraries/grail/default.nix b/pkgs/development/libraries/grail/default.nix
index 3a7ed879bff8..c8b1c0bdd9be 100644
--- a/pkgs/development/libraries/grail/default.nix
+++ b/pkgs/development/libraries/grail/default.nix
@@ -3,11 +3,11 @@
 
 stdenv.mkDerivation rec {
   name = "grail-${version}";
-  version = "3.1.0";
+  version = "3.1.1";
 
   src = fetchurl {
     url = "https://launchpad.net/grail/trunk/${version}/+download/${name}.tar.bz2";
-    sha256 = "c26dced1b3f4317ecf6af36db0e90294d87e43966d56aecc4e97b65368ab78b9";
+    sha256 = "1wwx5ibjdz5pyd0f5cd1n91y67r68dymxpm2lgd829041xjizvay";
   };
 
   buildInputs = [ pkgconfig python3 frame ]