diff --git a/index.d.ts b/index.d.ts
index db060da..7138455 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -17,7 +17,9 @@ declare type DetectorOptions = {
 	frameShiftMS?: number,
 	threshold?: number,
 	vadMode?: number,
-	vadDebounceTime?: number
+	vadDebounceTime?: number,
+	preEmphasisCoefficient?: number,
+	vad?: boolean
 };
 
 declare class Detector extends Transform {
@@ -52,4 +54,4 @@ declare class Detector extends Transform {
 	disableKeyword(keyword: string): void;
 }
 
-export = Detector;
\ No newline at end of file
+export = Detector;