diff --git a/README.md b/README.md
index 7cf695cf..0b615392 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,9 @@ This action provides the following functionality for GitHub Actions users:
 - Installing a version of Python or PyPy and (by default) adding it to the PATH
 - Optionally caching dependencies for pip, pipenv and poetry
 - Registering problem matchers for error output
+## Breaking changes in V7
+
+- **Migrated to ESM** to enable support for the latest `@actions/*` package versions.
 
 ## Breaking changes in V6