diff --git a/Documentation/markdown.md b/Documentation/markdown.md
index 23e3bae..e6b766c 100644
--- a/Documentation/markdown.md
+++ b/Documentation/markdown.md
@@ -443,8 +443,8 @@
 Relative and absolute links to image files within the Git repository
 (such as `../images/banner.png`) are resolved during rendering by
 inserting the base64 encoding of the image using a `data:` URI.  Only
-PNG (`*.png`), JPEG (`*.jpg` or `*.jpeg`) and GIF (`*.gif`) image
-formats are supported when referenced from the Git repository.
+PNG (`*.png`), JPEG (`*.jpg` or `*.jpeg`), GIF (`*.gif`) and WebP (`*.webp`)
+image formats are supported when referenced from the Git repository.
 
 Unsupported extensions or files larger than [image size](#Image-size)
 limit (default 256K) will display a broken image.