diff --git a/index.d.ts b/index.d.ts
index dacbea3..b9f4e9f 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -11,7 +11,9 @@ declare module "react-visibility-sensor" {
   interface Props {
     onChange?: (isVisible: boolean) => void;
     active?: boolean;
-    partialVisibility?: boolean;
+    partialVisibility?: 
+      | boolean
+      | Shape;
     offset?: Shape;
     minTopValue?: number;
     intervalCheck?: boolean;