diff --git a/Dockerfile b/Dockerfile
index 3c5535cd..1285314d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ ENV LANG="C.UTF-8" \
     SUPERUSER_PASSWORD="password" \
     SEARCH_SOURCE="themoviedb" \
     SCRAP_SOURCE="themoviedb" \
+    INDEXER_SITES="" \
     COOKIECLOUD_HOST="https://nastool.org/cookiecloud" \
     COOKIECLOUD_KEY="" \
     COOKIECLOUD_PASSWORD="" \