diff --git a/pkgs/tools/networking/ngrok-2/default.nix b/pkgs/tools/networking/ngrok-2/default.nix
index da598c6fbd5..89d6a9b454d 100644
--- a/pkgs/tools/networking/ngrok-2/default.nix
+++ b/pkgs/tools/networking/ngrok-2/default.nix
@@ -32,6 +32,8 @@ stdenv.mkDerivation {
     install -D ngrok $out/bin/ngrok
   '';
 
+  passthru.updateScript = ./update.sh;
+
   meta = {
     description = "ngrok";
     longDescription = ''