diff --git a/flake.nix b/flake.nix
index e8f6149..d0a7dc8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -38,6 +38,7 @@
           nodejs_23
           bun
           svelte-language-server
+          gh-markdown-preview
         ];
       };
     });