diff --git a/README.md b/README.md
index f46b52e..4ddb6b1 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ docker pull postgres:14
 ```
 - postgres 실행
 ```
-docker run -v ./:/var/lib/postgresql/data/pgdata --network mastodon --name mastodon-db -e POSTGRES_PASSWORD=ios2011a! -d postgres:14
+docker run -v ./:/var/lib/postgresql/data --network mastodon --name mastodon-db -e POSTGRES_PASSWORD=ios2011a! -e PGDATA=/var/lib/postgresql/data/pgdata -d postgres:14
 ```
 > postgres에 마운트할 디렉토리로 이동한 다음 커맨드 수행 (또는 마운트할 디렉토리를 입력 <span style='color:red'>./</span> 부분)