diff --git a/pkgs/tools/networking/htpdate/default.nix b/pkgs/tools/networking/htpdate/default.nix
index dbf97e5ce71b..482d01342bb8 100644
--- a/pkgs/tools/networking/htpdate/default.nix
+++ b/pkgs/tools/networking/htpdate/default.nix
@@ -1,14 +1,14 @@
 { stdenv, lib, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
-  version = "1.3.1";
+  version = "1.3.3";
   pname = "htpdate";
 
   src = fetchFromGitHub {
     owner = "twekkel";
     repo = pname;
     rev = "v${version}";
-    sha256 = "JPaxbu7LlGV+Bh5qxVxeNSPnMQNqLaLYWBRbpETSpQs=";
+    sha256 = "sha256-/xZxwEui8V5kyfGsmwRRkiyhj7lcJQaTmOjBihvdWg8=";
   };
 
   makeFlags = [