diff --git a/modules/fish.nix b/modules/fish.nix
index fc4ce545..3565c97e 100644
--- a/modules/fish.nix
+++ b/modules/fish.nix
@@ -116,6 +116,7 @@
 
       c = "clear";
       e = "exit";
+      k = "kitty @ set-background-opacity";
       l = "ls -l";
       n = "nvim";
       j = "joshuto";