diff --git a/README.md b/README.md
index 3fad684..e520b44 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,5 @@
 # Scan-Publish
 A tool to prepare scans for publishing: aspect ratio normalization, resizing, format conversion...
+
+## Limitations
+Only works for scans where the height of a page is greater than its width.