diff --git a/packages/generator/src/generator.ts b/packages/generator/src/generator.ts
index 3737780..b6c99b4 100644
--- a/packages/generator/src/generator.ts
+++ b/packages/generator/src/generator.ts
@@ -85,8 +85,18 @@ generatorHandler({
 function handleFormatting() {
 	const generator = getGenerator()
 	if (generator.config.formatter == null) return
-
-	execSync(`prettier --write ${generator.output.path}`, { stdio: 'inherit' })
+	switch (generator.config.formatter) {
+		case 'prettier':
+			execSync(`prettier --write ${generator.output.path}`, {
+				stdio: 'inherit',
+			})
+			break
+		case 'biome':
+			execSync(`biome format --write ${generator.output.path}`, {
+				stdio: 'inherit',
+			})
+			break
+	}
 }
 
 export function reduceImports(imports: ImportValue[]) {
diff --git a/packages/generator/src/lib/config.ts b/packages/generator/src/lib/config.ts
index 8c07ca1..4c67dfd 100644
--- a/packages/generator/src/lib/config.ts
+++ b/packages/generator/src/lib/config.ts
@@ -7,6 +7,7 @@ import {
 	object,
 	optional,
 	safeParse,
+	union,
 } from 'valibot'
 import { DateMode } from '~/shared/date-mode'
 import { ModuleResolution } from '~/shared/generator-context/module-resolution'
@@ -16,7 +17,7 @@ const Config = object({
 	relationalQuery: withDefault(optional(BooleanInStr), true),
 	moduleResolution: optional(ModuleResolution),
 	verbose: optional(BooleanInStr),
-	formatter: optional(literal('prettier')),
+	formatter: optional(union([literal('prettier'), literal('biome')])),
 	dateMode: optional(DateMode),
 })
 export type Config = Output<typeof Config>