diff --git a/kitty.nix b/kitty.nix
index 372d237..f1318d1 100644
--- a/kitty.nix
+++ b/kitty.nix
@@ -1,13 +1,13 @@
 { theme, ... }:
 
 let
-  theme_name = if theme == "light" then "Solarized Light" else "Solarized Dark";
+  theme_file = if theme == "light" then "Solarized_Light" else "Solarized_Dark";
 in
 {
   programs = {
     kitty = {
       enable = true;
-      theme = theme_name;
+      themeFile = theme_file;
       font = {
         name = "FiraCode";
       };