diff --git a/README.md b/README.md
index c6cd3fa..8d7268e 100644
--- a/README.md
+++ b/README.md
@@ -17,5 +17,6 @@ helm upgrade --install metrics-server brunner.ninja/metrics-server \
   --namespace kube-system --wait --timeout 5m
 ```
 
-Chart tags version this adapter; `appVersion` records the upstream image
-version.
+Tag this adapter from the upstream image release: `v0.9.0` publishes chart
+`0.9.0`. Later chart commits append the Git describe count and hash;
+`appVersion` remains the upstream image version.