diff --git a/examples/docs_to_knowledge_graph/.env b/examples/docs_to_knowledge_graph/.env
index 2ff10b65..335f3060 100644
--- a/examples/docs_to_knowledge_graph/.env
+++ b/examples/docs_to_knowledge_graph/.env
@@ -1,3 +1,2 @@
 # Postgres database address for cocoindex
 COCOINDEX_DATABASE_URL=postgres://cocoindex:cocoindex@localhost/cocoindex
-COCOINDEX_APP_NAMESPACE=Dev0