diff --git a/pkgs/applications/networking/instant-messengers/slack/dark-theme.nix b/pkgs/applications/networking/instant-messengers/slack/dark-theme.nix
index 76987d08ff4b..4e6028621976 100644
--- a/pkgs/applications/networking/instant-messengers/slack/dark-theme.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/dark-theme.nix
@@ -1,9 +1,9 @@
 { stdenv, fetchurl }:
 
 let
-  rev = "56d2007b5ba9f1628a44af6edf5dbdf74cf92278";
-  sha256 = "1v264mpf9ddiz8zb7fcyjwy1a2yr5f4xs520gf63kl9378v721da";
-  version = "2019-03-15";
+  rev = "5cdbb97898d727d2b35c25a3117e9a79e474d97b";
+  sha256 = "14qikp91l2aj8j9i0nh0nf9ibz65b8bpd3lbyarqshhrpvb5jp79";
+  version = "2019-06-04";
 in stdenv.mkDerivation {
   inherit version;