diff --git a/doom/packages.el b/doom/packages.el
index 2097c2d..ac51b21 100644
--- a/doom/packages.el
+++ b/doom/packages.el
@@ -10,6 +10,7 @@
 (package! just-mode)
 (package! wakatime-mode)
 (package! org-recur)
+(package! ob-mermaid)
 
 (package! prisma-mode :recipe (:host github :repo "pimeys/emacs-prisma-mode" :branch "main"))
 
diff --git a/home-manager/home.nix b/home-manager/home.nix
index 4d3826e..fe49049 100644
--- a/home-manager/home.nix
+++ b/home-manager/home.nix
@@ -24,6 +24,7 @@
     bat
     just
     tokei
+    mermaid-cli
 
     # Elixir
     elixir