diff --git a/react-cropper/react-cropper.d.ts b/react-cropper/react-cropper.d.ts
index cc4b935bad..58f7bd62f7 100644
--- a/react-cropper/react-cropper.d.ts
+++ b/react-cropper/react-cropper.d.ts
@@ -126,7 +126,7 @@ declare namespace ReactCropper {
 
         setCropBoxData(data: any): void;
 
-        getCroppedCanvas(options? any): void;
+        getCroppedCanvas(options?: any): void;
 
         setAspectRatio(aspectRatio: number): void;