diff --git a/biome.json b/biome.json
new file mode 100644
index 0000000..cd6e445
--- /dev/null
+++ b/biome.json
@@ -0,0 +1,16 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.4.13/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "ignoreUnknown": true
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2
+  }
+}
diff --git a/flake.nix b/flake.nix
index 43b5861..74702cd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,7 +23,7 @@
         default = pkgs.mkShell {
           packages = [
             pkgs.just
-            pkgs.prettier
+            pkgs.biome
             pkgs.stylua
             pkgs.neovim
             pkgs.selene
@@ -35,7 +35,7 @@
         ci = pkgs.mkShell {
           packages = [
             pkgs.just
-            pkgs.prettier
+            pkgs.biome
             pkgs.stylua
             pkgs.neovim
             pkgs.selene
diff --git a/justfile b/justfile
index 0f49266..bdb7dcb 100644
--- a/justfile
+++ b/justfile
@@ -4,7 +4,7 @@ default:
 format:
     nix fmt -- --ci
     stylua --check .
-    prettier --check .
+    biome format .
 
 lint:
     git ls-files '*.lua' | xargs selene --display-style quiet