diff --git a/tutorials/dapt-curation/code/requirements.txt b/tutorials/dapt-curation/code/requirements.txt
old mode 100755
new mode 100644
index 481f5b0a3..d51cb03db
--- a/tutorials/dapt-curation/code/requirements.txt
+++ b/tutorials/dapt-curation/code/requirements.txt
@@ -1,7 +1,7 @@
 arxiv==2.1.0
 arxiv-downloader
 cchardet
-nltk==3.8.1
+nltk==3.9
 poppler-utils
 unstructured[all-docs]==0.14.5
 unstructured[pdf]