diff --git a/pkgs/tools/networking/ntp/default.nix b/pkgs/tools/networking/ntp/default.nix
index 29f8e1ae2570..1178f5f0107e 100644
--- a/pkgs/tools/networking/ntp/default.nix
+++ b/pkgs/tools/networking/ntp/default.nix
@@ -8,11 +8,11 @@ let
 in
 
 stdenv.mkDerivation rec {
-  name = "ntp-4.2.8p10";
+  name = "ntp-4.2.8p11";
 
   src = fetchurl {
     url = "http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/${name}.tar.gz";
-    sha256 = "17xrk7gxrl3hgg0i73n8qm53knyh01lf0f3l1zx9x6r1cip3dlnx";
+    sha256 = "13i7rp1va29ffjdk08fvsfl6n47zzwsp147zhgb550k8agvkjjpi";
   };
 
   # The hardcoded list of allowed system calls for seccomp is