diff --git a/deploy/nginx.conf b/deploy/nginx.conf
index fd825d5..d94b8f7 100644
--- a/deploy/nginx.conf
+++ b/deploy/nginx.conf
@@ -10,8 +10,11 @@ server {
     add_header Referrer-Policy "no-referrer" always;
 
     # Service Worker & Manifest nie cachen -> App-Updates greifen sofort.
-    location = /sw.js               { add_header Cache-Control "no-cache"; }
-    location = /manifest.webmanifest { add_header Cache-Control "no-cache"; }
+    location = /sw.js { add_header Cache-Control "no-cache"; }
+    location = /manifest.webmanifest {
+        default_type application/manifest+json;   # nginx-alpine kennt .webmanifest nicht
+        add_header Cache-Control "no-cache";
+    }
 
     # Entwickler-/Test-Artefakte (_-Präfix) niemals ausliefern.
     location ~ /_ { deny all; }