diff --git a/docker/appstream-gen.py b/docker/appstream-gen.py
index 57645a3..2ea9e16 100644
--- a/docker/appstream-gen.py
+++ b/docker/appstream-gen.py
@@ -30,16 +30,18 @@ DEFAULT_NOTE = "Über Unternehmens-Repo bereitgestellt."
 
 
 def die(msg):
-    print(f"[appstream-gen] FEHLER: {msg}", file=sys.stderr)
+    sys.stdout.flush()
+    print(f"[appstream-gen] FEHLER: {msg}", file=sys.stderr, flush=True)
     sys.exit(1)
 
 
 def warn(msg):
-    print(f"[appstream-gen] WARNUNG: {msg}", file=sys.stderr)
+    sys.stdout.flush()
+    print(f"[appstream-gen] WARNUNG: {msg}", file=sys.stderr, flush=True)
 
 
 def info(msg):
-    print(f"[appstream-gen] {msg}")
+    print(f"[appstream-gen] {msg}", flush=True)
 
 
 def sanitize_id_part(value):