diff --git a/README.md b/README.md
index fc18f5d..3b0f2ca 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,7 @@ const [visible, setIsVisible] = useState(false);
 | Prop name                | Description                                                                                         | Type                                                        | Required |
 | ------------------------ | --------------------------------------------------------------------------------------------------- | ----------------------------------------------------------- | -------- |
 | `images`                 | Array of images to display                                                                          | ImageSource[]                                               | true     |
+| `keyExtractor`           | Uniqely identifying each image    | (imageSrc: ImageSource, index: number) => string | false |
 | `imageIndex`             | Current index of image to display                                                                   | number                                                      | true     |
 | `visible`                | Is modal shown or not                                                                               | boolean                                                     | true     |
 | `onRequestClose`         | Function called to close the modal                                                                  | function                                                    | true     |
diff --git a/src/ImageViewing.tsx b/src/ImageViewing.tsx
index f70b39f..d4cffe7 100644
--- a/src/ImageViewing.tsx
+++ b/src/ImageViewing.tsx
@@ -28,6 +28,7 @@ import { ImageSource } from "./@types";
 
 type Props = {
   images: ImageSource[];
+  keyExtractor?: (imageSrc: ImageSource, index: number) => string;
   imageIndex: number;
   visible: boolean;
   onRequestClose: () => void;
@@ -51,6 +52,7 @@ const SCREEN_WIDTH = SCREEN.width;
 
 function ImageViewing({
   images,
+  keyExtractor,
   imageIndex,
   visible,
   onRequestClose,
@@ -147,7 +149,7 @@ function ImageViewing({
           )}
           onMomentumScrollEnd={onScroll}
           //@ts-ignore
-          keyExtractor={(imageSrc) => imageSrc.uri || `${imageSrc}`}
+          keyExtractor={(imageSrc, index) => keyExtractor ? keyExtractor(imageSrc, index) : imageSrc.uri || `${imageSrc}`}
         />
         {typeof FooterComponent !== "undefined" && (
           <Animated.View