diff --git a/README.md b/README.md
index a5442473..95d58bb7 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@ To avoid upgrades for each iteration of `helm`, the `helmfile` executable delega
 
 ## configuration syntax
 
+**CAUTION**: This documentation is for the development version of helmfile. If you are looking for the documentation for any of releases, please switch to the corresponding branch like [v0.12.0](https://github.com/roboll/helmfile/tree/v0.12.0).
+
 The default helmfile is `helmfile.yaml`:
 
 ```yaml