diff --git a/infra/compose/observability.yml b/infra/compose/observability.yml
index 00cdf32..a6782c2 100644
--- a/infra/compose/observability.yml
+++ b/infra/compose/observability.yml
@@ -54,7 +54,7 @@ services:
       - '--web.enable-lifecycle'
     volumes:
       - ../../infra/otel/prometheus.yml:/etc/prometheus/prometheus.yml:ro
-      - prometheus_data:/prometheus
+      - /prometheus
 
   # ── Custom Dashboard (nginx:alpine) ──
   dashboard:
@@ -78,9 +78,6 @@ services:
       otel-collector:
         condition: service_started
 
-volumes:
-  prometheus_data:
-
 networks:
   app-shared-net:
     name: app-shared-net