diff --git a/pkgs/development/libraries/fastjson/default.nix b/pkgs/development/libraries/fastjson/default.nix
index c56e05e07532..9c7f4893cbe4 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 = "0.99.8";
+  version = "0.99.9";
   pname = "fastjson";
   src = fetchFromGitHub {
     repo = "libfastjson";
     owner = "rsyslog";
     rev = "v${version}";
-    sha256 = "0qhs0g9slj3p0v2z4s3cnsx44msrlb4k78ljg7714qiziqbrbwyl";
+    sha256 = "sha256-2LyBdJR0dV1CElcGfrlmNwX52lVtx9X/Z4h/1XFjOIs=";
   };
 
   buildInputs = [ autoconf automake libtool ];