diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index 6b2c2875e3e..d27bd6a521d 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -75,6 +75,8 @@ let
   linux = stdenv.mkDerivation rec {
     inherit pname version src meta;
 
+    passthru.updateScript = ./update.sh;
+
     rpath = stdenv.lib.makeLibraryPath [
       alsaLib
       at-spi2-atk
@@ -159,6 +161,8 @@ let
   darwin = stdenv.mkDerivation {
     inherit pname version src meta;
 
+    passthru.updateScript = ./update.sh;
+
     nativeBuildInputs = [ undmg ];
 
     sourceRoot = "Slack.app";