diff --git a/.prettierignore b/.prettierignore
index 15edf3c..2c7c605 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -12,3 +12,17 @@ out
 
 ## Ignore dependencies
 node_modules
+
+## Files that are formatted by biome
+**/*.js
+**/*.ts
+**/*.cjs
+**/*.cts
+**/*.mjs
+**/*.mts
+**/*.d.cts
+**/*.d.mts
+**/*.jsx
+**/*.tsx
+**/*.json
+**/*.jsonc
diff --git a/package.json b/package.json
index 5a44c66..4b76f45 100644
--- a/package.json
+++ b/package.json
@@ -229,7 +229,7 @@
     "*.{md,markdown}": [
       "markdownlint-cli2 --fix"
     ],
-    "*.{js,ts,cjs,mjs,d.cts,d.mts,jsx,tsx,json,jsonc}": [
+    "*.{js,ts,cjs,cts,mjs,mts,d.cts,d.mts,jsx,tsx,json,jsonc}": [
       "biome check --files-ignore-unknown=true",
       "biome check --write --no-errors-on-unmatched",
       "biome format --write --no-errors-on-unmatched"