diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..33b8c23
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,2 @@
+package-lock.json
+pnpm-lock.yaml
diff --git a/package.json b/package.json
index 81c3119..0a7468e 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
     "@types/chroma-js": "latest",
     "@types/mdast": "latest",
     "@types/node": "latest",
+    "prettier": "3.8.3",
     "svelte": "latest",
     "svelte-check": "latest",
     "tailwindcss": "latest",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 36a8eae..d64d713 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -92,6 +92,9 @@ importers:
       "@types/node":
         specifier: latest
         version: 26.0.0
+      prettier:
+        specifier: 3.8.3
+        version: 3.8.3
       svelte:
         specifier: latest
         version: 5.56.3