diff --git a/mcp_server/docker-compose.yml b/mcp_server/docker-compose.yml
index cb4e5a67..1a0a548a 100644
--- a/mcp_server/docker-compose.yml
+++ b/mcp_server/docker-compose.yml
@@ -5,7 +5,7 @@ services:
       - "7474:7474" # HTTP
       - "7687:7687" # Bolt
     environment:
-      - NEO4J_AUTH=neo4j/demodemo
+      - NEO4J_AUTH=${NEO4J_USER:-neo4j}/${NEO4J_PASSWORD:-demodemo}
       - NEO4J_server_memory_heap_initial__size=512m
       - NEO4J_server_memory_heap_max__size=1G
       - NEO4J_server_memory_pagecache_size=512m