diff --git a/ci/pod/docker-compose.plugin.yml b/ci/pod/docker-compose.plugin.yml
index eb05bb4ea0da..226abd7ed204 100644
--- a/ci/pod/docker-compose.plugin.yml
+++ b/ci/pod/docker-compose.plugin.yml
@@ -126,14 +126,14 @@ services:
   openldap:
     image: bitnami/openldap:2.5.8
     environment:
-      LDAP_ADMIN_USERNAME: amdin
-      LDAP_ADMIN_PASSWORD: adminpassword
-      LDAP_USERS: user01,user02
-      LDAP_PASSWORDS: password1,password2
-      LDAP_ENABLE_TLS: yes
-      LDAP_TLS_CERT_FILE: /certs/localhost_slapd_cert.pem
-      LDAP_TLS_KEY_FILE: /certs/localhost_slapd_key.pem
-      LDAP_TLS_CA_FILE: /certs/apisix.crt
+      - LDAP_ADMIN_USERNAME=amdin
+      - LDAP_ADMIN_PASSWORD=adminpassword
+      - LDAP_USERS=user01,user02
+      - LDAP_PASSWORDS=password1,password2
+      - LDAP_ENABLE_TLS=yes
+      - LDAP_TLS_CERT_FILE=/certs/localhost_slapd_cert.pem
+      - LDAP_TLS_KEY_FILE=/certs/localhost_slapd_key.pem
+      - LDAP_TLS_CA_FILE=/certs/apisix.crt
     ports:
       - "1389:1389"
       - "1636:1636"