diff --git a/pkgs/servers/http/lwan/default.nix b/pkgs/servers/http/lwan/default.nix
index 11b580ed8a0c..3e90857d8db8 100644
--- a/pkgs/servers/http/lwan/default.nix
+++ b/pkgs/servers/http/lwan/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "lwan";
-  version = "0.3";
+  version = "0.4";
 
   src = fetchFromGitHub {
     owner = "lpereira";
     repo = pname;
     rev = "v${version}";
-    sha256 = "1znkcsbxw3r10prqvf2x27w1wmm9kd485pj59c364wlvqdhidwqr";
+    sha256 = "sha256-Z8kiuZHLEupCKFrj8guiu9fTG7s+5KiQ6x0pg9iMy0c=";
   };
 
   nativeBuildInputs = [ cmake pkg-config ];