diff --git a/README.md b/README.md
index 431daf26b..a4fc55d30 100644
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+++ b/README.md
@@ -13,6 +13,8 @@ Users may submit PRs to update any information here.
 
 The format is described [here](https://osv.dev/docs/index.html#tag/vulnerability_schema).
 
+Note that this format may not be stable and is subject to change.
+
 ## Automation
 
 Vulnerabilities undergo **automated bisection** and **repository analysis** as part of