diff --git a/app/Dockerfile b/app/Dockerfile
index b725d2a..2aa09a4 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -46,8 +46,6 @@ RUN { \
 
 VOLUME /var/www/html
 
-ENV TZ=Asia/Seoul
-
 COPY entrypoint_hidche_app.sh /usr/local/bin/
 COPY id_ecdsa.key /var/www/.ssh/id_ecdsa
 COPY known_hosts /var/www/.ssh/known_hosts
diff --git a/app/entrypoint_hidche_app.sh b/app/entrypoint_hidche_app.sh
index d4a5724..78733b7 100755
--- a/app/entrypoint_hidche_app.sh
+++ b/app/entrypoint_hidche_app.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-set -uxo pipefail
+set -euxo pipefail
 shopt -s nullglob
 
 ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
diff --git a/db/Dockerfile b/db/Dockerfile
index 2c9a5be..9537671 100644
--- a/db/Dockerfile
+++ b/db/Dockerfile
@@ -1,9 +1,6 @@
 FROM mariadb
 #ubuntu
 
-
-ENV TZ=Asia/Seoul
-
 COPY entrypoint_hidche_db.sh /usr/local/bin/
 ENTRYPOINT ["entrypoint_hidche_db.sh"]