diff --git a/postgres/15/Dockerfile b/postgres/15/Dockerfile
index efaeff6..9e97822 100644
--- a/postgres/15/Dockerfile
+++ b/postgres/15/Dockerfile
@@ -22,6 +22,6 @@ VOLUME /opt/bonita/dump
 COPY 0_init-databases.sql /docker-entrypoint-initdb.d/0_init-databases.sql
 COPY 1_update-postgresql-conf.sh /docker-entrypoint-initdb.d/1_update-postgresql-conf.sh
 COPY 2_restore_dump.sh /docker-entrypoint-initdb.d/2_restore_dump.sh
-COPY healthcheck.sh /usr/local/bin/healthcheck.sh
+COPY --chmod=755 healthcheck.sh /usr/local/bin/healthcheck.sh
 
 HEALTHCHECK --interval=5s --retries=120 CMD ["/usr/local/bin/healthcheck.sh"]
diff --git a/postgres/15/healthcheck.sh b/postgres/15/healthcheck.sh
old mode 100644
new mode 100755
index 71bee33..5a2b9cf
--- a/postgres/15/healthcheck.sh
+++ b/postgres/15/healthcheck.sh
@@ -8,9 +8,10 @@ if [ -f /var/lib/postgresql/restore.inProgress ]; then
   exit 1
 fi
 
-user="${POSTGRES_USER:-bonita}"
-db="${POSTGRES_DB:-$user}"
-export PGPASSWORD="${POSTGRES_PASSWORD:-bpm}"
+host="$(hostname -i || echo '127.0.0.1')"
+user="bonita"
+db="bonita"
+export PGPASSWORD="bpm"
 
 args=(
   # force postgres to not use the local unix socket (test "external" connectivity)