diff --git a/pkgs/games/vassal/default.nix b/pkgs/games/vassal/default.nix
index 413d98d26ac..dd6c4e36e3c 100644
--- a/pkgs/games/vassal/default.nix
+++ b/pkgs/games/vassal/default.nix
@@ -1,11 +1,12 @@
-{ stdenv, fetchurl, jre, makeWrapper }:
+{ stdenv, fetchzip, jre, makeWrapper }:
 
 stdenv.mkDerivation rec {
-  name = "VASSAL-3.3.2";
+  pname = "VASSAL";
+  version = "3.4.12";
 
-  src = fetchurl {
-    url = "mirror://sourceforge/vassalengine/${name}-linux.tar.bz2";
-    sha256 = "1abhlkl27gyfa1lghvv76xa6ks5hiwv2s9wb9ddadm0m07f87n1w";
+  src = fetchzip {
+    url = "https://github.com/vassalengine/vassal/releases/download/${version}/${pname}-${version}-linux.tar.bz2";
+    sha256 = "0xn403fxz6ay5lv8whyfdq611kvxj5q309bj317yw5cxbb08w1yb";
   };
 
   buildInputs = [ makeWrapper ];
@@ -13,7 +14,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     mkdir -p $out/bin $out/share/vassal $out/doc
 
-    cp CHANGES LICENSE README $out
+    cp CHANGES LICENSE README.md $out
     cp -R lib/* $out/share/vassal
     cp -R doc/* $out/doc
 
@@ -28,7 +29,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
       description = "A free, open-source boardgame engine";
       homepage = "http://www.vassalengine.org/";
-      license = licenses.lgpl21;
+      license = licenses.lgpl21Only;
       maintainers = with maintainers; [ tvestelind ];
       platforms = platforms.linux;
   };