diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index 137783552112..15943d34e426 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -42,11 +42,11 @@ let
 
   pname = "slack";
 
-  x86_64-darwin-version = "4.16.0";
-  x86_64-darwin-sha256 = "078f49sgazfa99vn0yyacfya3jl2vhqz7kgxh0qp56b66pnzwbxz";
+  x86_64-darwin-version = "4.17.0";
+  x86_64-darwin-sha256 = "0r5cafxw73qnn14ljprn7w8bfn67zbkcniq60k9pf2zbqgb4cyj9";
 
-  x86_64-linux-version = "4.16.0";
-  x86_64-linux-sha256 = "0dj5k7r044mibis0zymh6wryhbw2fzsch30nddfrnn6ij89hhirv";
+  x86_64-linux-version = "4.17.0";
+  x86_64-linux-sha256 = "07ccms58pq27ilkyhcf6cgwb7qrddwil5kgy8yv95ljikqzi5rxi";
 
   version = {
     x86_64-darwin = x86_64-darwin-version;