diff --git a/README.md b/README.md
index 19cc6511d..419aa82e0 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # AICSImageIO
 
+> [!WARNING]  
+> AICSImageIO is now in maintenance mode only.  Please take a look at its compatible successor [`bioio`](https://github.com/bioio-devs/bioio) ([see here for migration guide](https://bioio-devs.github.io/bioio/MIGRATION.html))
+
 [![Build Status](https://github.com/AllenCellModeling/aicsimageio/actions/workflows/build-main.yml/badge.svg)](https://github.com/AllenCellModeling/aicsimageio/actions)
 [![Documentation](https://github.com/AllenCellModeling/aicsimageio/workflows/Documentation/badge.svg)](https://AllenCellModeling.github.io/aicsimageio/)
 [![Code Coverage](https://codecov.io/gh/AllenCellModeling/aicsimageio/branch/main/graph/badge.svg)](https://app.codecov.io/gh/AllenCellModeling/aicsimageio/branch/main)
@@ -7,6 +10,7 @@
 
 Image Reading, Metadata Conversion, and Image Writing for Microscopy Images in Pure Python
 
+
 ---
 
 ## Features