diff --git a/README.md b/README.md
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+++ b/README.md
@@ -110,6 +110,7 @@ you. For example:
 | BboxIoU | BboxIoU returns the intersection over union of two bounding boxes normalized to 2 decimal places. |
 | SegIoU | SegIoU returns the intersection over union of two segmentation masks normalized to 2 decimal places. |
 | BoxDistance | BoxDistance returns the minimum distance between two bounding boxes normalized to 2 decimal places. |
+| BboxContains | BboxContains returns the intersection of two boxes over the target box area. It is good for check if one box is contained within another box. |
 | ExtractFrames | ExtractFrames extracts frames with motion from a video. |
 | ZeroShotCounting | ZeroShotCounting returns the total number of objects belonging to a single class in a given image |
 | VisualPromptCounting | VisualPromptCounting returns the total number of objects belonging to a single class given an image and visual prompt |