diff --git a/typings.d.ts b/typings.d.ts
index 3411867d..08a332eb 100644
--- a/typings.d.ts
+++ b/typings.d.ts
@@ -55,6 +55,7 @@ export function create(width: number, height: number, color: Color, callback: Im
 
 export type JpegBufferParams = {
     quality?: number;
+    progressive ?: boolean;
 };
 
 export type PngBufferParams = {