diff --git a/grafana/env.cfg b/grafana/env.cfg
index 5e499bd..97b7021 100644
--- a/grafana/env.cfg
+++ b/grafana/env.cfg
@@ -1 +1,2 @@
-IMAGE_TAG=grafana/grafana:12.2.0
\ No newline at end of file
+IMAGE_TAG_VER=12.2.0
+IMAGE_TAG=grafana/grafana:${IMAGE_TAG_VER}
\ No newline at end of file