diff --git a/.env b/.env
index 29b9118758..dbddebf4fa 100644
--- a/.env
+++ b/.env
@@ -8,6 +8,7 @@ IMAGE_NAME=ghcr.io/open-telemetry/demo
 COLLECTOR_CONTRIB_IMAGE=otel/opentelemetry-collector-contrib:0.93.0
 GRAFANA_IMAGE=grafana/grafana:10.3.1
 JAEGERTRACING_IMAGE=jaegertracing/all-in-one:1.53
+# must also update version field in /src/grafana/provisioning/datasources/opensearch.yml
 OPENSEARCH_IMAGE=opensearchproject/opensearch:2.11.1
 POSTGRES_IMAGE=postgres:16.1
 PROMETHEUS_IMAGE=quay.io/prometheus/prometheus:v2.49.1