diff --git a/pkgs/tools/networking/ntp/default.nix b/pkgs/tools/networking/ntp/default.nix
index d0c652ca636c..b984d6aa0b74 100644
--- a/pkgs/tools/networking/ntp/default.nix
+++ b/pkgs/tools/networking/ntp/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "ntp";
-  version = "4.2.8p17";
+  version = "4.2.8p18";
 
   src = fetchurl {
     url = "https://archive.ntp.org/ntp4/ntp-${lib.versions.majorMinor version}/ntp-${version}.tar.gz";
-    hash = "sha256-ED3ScuambFuN8H3OXpoCVV/NbxOXvft4IjcyjonTqGY=";
+    hash = "sha256-z4TF8/saKVKElCYk2CP/+mNBROCWz8T5lprJjvX0aOU=";
   };
 
   configureFlags = [