diff --git a/docs/proxy/headroom.md b/docs/proxy/headroom.md
index e950c3300..ec743bb0b 100644
--- a/docs/proxy/headroom.md
+++ b/docs/proxy/headroom.md
@@ -3,6 +3,12 @@ import TabItem from '@theme/TabItem';
 
 # Prompt Compression (Headroom)
 
+:::info
+
+The Headroom integration is available from LiteLLM `v1.91.0.rc1` and later.
+
+:::
+
 Headroom is the context optimization layer for LLM applications. It compresses tool outputs, database results, file reads, and RAG payloads before they reach the model, so you get the same answers at a fraction of the tokens.
 
 This is available on both `/v1/chat/completions` and `/v1/messages` (Anthropic format).