diff --git a/app.py b/app.py
index bae7a9f..5a9f371 100644
--- a/app.py
+++ b/app.py
@@ -52,5 +52,6 @@ def create_app() -> Flask:
 
 if __name__ == "__main__":
     port = int(os.environ.get("PORT", "7860"))
+    debug = os.environ.get("FLASK_DEBUG", "0") == "1"
     app = create_app()
-    app.run(host="0.0.0.0", port=port, debug=True)
+    app.run(host="0.0.0.0", port=port, debug=debug)
diff --git a/compiler.py b/compiler.py
index b0fcf5d..9ae6e24 100644
--- a/compiler.py
+++ b/compiler.py
@@ -212,7 +212,12 @@ def to_yaml(nodes: list[NormalizedNode], relations: list[NormalizedRelation]) ->
         )
 
     doc = {"entities": entities, "relations": rel_items}
-    return yaml.safe_dump(doc, sort_keys=False)
+    return yaml.safe_dump(
+        doc,
+        sort_keys=False,
+        default_flow_style=False,
+        allow_unicode=True,
+    )
 
 
 def compile_graph(graph: dict[str, Any]) -> str: