diff --git a/pkgs/development/libraries/fastjson/default.nix b/pkgs/development/libraries/fastjson/default.nix
index e4a169ef8ba..fe71d56357d 100644
--- a/pkgs/development/libraries/fastjson/default.nix
+++ b/pkgs/development/libraries/fastjson/default.nix
@@ -1,13 +1,13 @@
 { lib, stdenv, fetchFromGitHub, libtool, autoconf, automake }:
 
 stdenv.mkDerivation rec {
-  version = "0.99.9";
+  version = "1.2304.0";
   pname = "fastjson";
   src = fetchFromGitHub {
     repo = "libfastjson";
     owner = "rsyslog";
     rev = "v${version}";
-    sha256 = "sha256-2LyBdJR0dV1CElcGfrlmNwX52lVtx9X/Z4h/1XFjOIs=";
+    sha256 = "sha256-WnM6lQjHz0n5BwWWZoDBavURokcaROXJW46RZen9vj4=";
   };
 
   nativeBuildInputs = [ autoconf automake ];