diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,4 +1,8 @@
 # Analytics-CSharp
+
+### ⚠️ Maintenance ⚠️
+This library is in maintenance mode. It will send data as intended, but receive no new feature support and only critical maintenance updates from Segment.
+
 ![Nuget](https://img.shields.io/nuget/v/Segment.Analytics.CSharp)
 [![openupm](https://img.shields.io/npm/v/com.segment.analytics.csharp?label=openupm&registry_uri=https://package.openupm.com)](https://openupm.com/packages/com.segment.analytics.csharp/)
 [![](https://github.com/segmentio/analytics-csharp/actions/workflows/build.yml/badge.svg)](https://github.com/segmentio/analytics-csharp/actions)