diff --git a/projects/33/app/requirements.txt b/projects/33/app/requirements.txt
index 1622428..96fc41c 100644
--- a/projects/33/app/requirements.txt
+++ b/projects/33/app/requirements.txt
@@ -52,5 +52,5 @@ urllib3==1.25.11
 Werkzeug==1.0.1
 wikidataintegrator==0.8.0
 pdfminer.six==20201018
-nltk==3.2.5
+nltk==3.6.6
 ete3==3.1.2
\ No newline at end of file