diff --git a/index.ts b/index.ts
index 4597669..5beec0d 100644
--- a/index.ts
+++ b/index.ts
@@ -9,9 +9,9 @@ export class File implements Writer {
     private readonly sink: FileSink;
     readonly _options: WriterOptions;
 
-    public constructor(options: WriterOptions & { path: string }) {
-        const {path, ...rest} = options
-        this._options = rest
+    public constructor(options: { minLevel: Level, path: string }) {
+        const {path, minLevel} = options
+        this._options = {minLevel, with_color: false}
         this.sink = file(path).writer({ highWaterMark: 128 * 1024 })
     }