diff --git a/requirements.txt b/requirements.txt
index b9e4fe63e368c70d6636a3f8272458ea2eb8ed1e..242a4a811da07fc6cbbfd56ca0f770dded168472 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,6 +17,4 @@ natsort
 dask
 plotly
 tabulate
-duckduckpy
-#jupyter-server-proxy==1.2.0
-#nbserverproxy==0.8.8
+crossref-commons
\ No newline at end of file