diff --git a/Dockerfile b/Dockerfile
index f794764..ef024e4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM nextcloud:30.0.6
+FROM nextcloud:30.0.6@sha256:6456ee9dab40419b9e3349f1a0c46d5764c47a5565fe2a105cd2b5f6ea77dbe5
 
 
 ENV PHP_UPLOAD_LIMIT=20G