diff --git a/apps/photoprism/docker-compose.yml b/apps/photoprism/docker-compose.yml
index 2b2d5d7e..4c615400 100644
--- a/apps/photoprism/docker-compose.yml
+++ b/apps/photoprism/docker-compose.yml
@@ -11,7 +11,7 @@ services:
       - "${APP_PORT}:2342"
     environment:
       PHOTOPRISM_ADMIN_PASSWORD: ${PHOTOPRISM_ADMIN_PASSWORD}
-      PHOTOPRISM_SITE_URL: "https://${APP_DOMAIN}/"
+      PHOTOPRISM_SITE_URL: "${APP_PROTOCOL:-http}://${APP_DOMAIN}/"
       PHOTOPRISM_ORIGINALS_LIMIT: 5000
       PHOTOPRISM_HTTP_COMPRESSION: "gzip"
       PHOTOPRISM_LOG_LEVEL: "info"