diff --git a/check.py b/check.py
index b4b6383..61b46b1 100755
--- a/check.py
+++ b/check.py
@@ -302,6 +302,13 @@ def find_new_conference_web_sites(
     return new
 
 
+class NoAliasDumper(yaml.SafeDumper):
+    """Dumper that disables YAML anchors and aliases."""
+    def ignore_aliases(self, data):
+        """Skip alias generation."""
+        return True  # disables anchors and aliases
+
+
 def main(show_not_live: bool = False) -> None:
     """Check fow new conference web sites."""
     live: list[LiveConference] = load_yaml("live")
@@ -310,7 +317,14 @@ def main(show_not_live: bool = False) -> None:
 
     live_filename = os.path.expanduser(config["data"]["live"])
     with open(live_filename, "w") as out:
-        yaml.dump(live + new, stream=out, sort_keys=False)
+        yaml.dump(
+            live + new,
+            stream=out,
+            sort_keys=False,
+            Dumper=NoAliasDumper,
+            allow_unicode=True,
+            default_flow_style=False,
+        )
 
 
 if __name__ == "__main__":