diff --git a/docker-compose.yml b/docker-compose.yml
index 5c5fe66..3de8eb4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -78,7 +78,7 @@ services:
       - traefik.http.services.prometheus.loadbalancer.server.port=9090
     volumes:
       - ${REPO_DIR}/configurations/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
-      - ${STORAGE_DIR}/prometheus:/prometheus:rw
+      - prometheus-data:/prometheus:rw
     command:
       - '--config.file=/etc/prometheus/prometheus.yml'
       - '--storage.tsdb.path=/prometheus'
@@ -125,3 +125,5 @@ services:
 # Only enable if external services present
 #     ports:
 #       - 4317:4317 # OTLP gRPC receiver
+volumes:
+  prometheus-data: