diff --git a/adi_function_app/requirements.txt b/adi_function_app/requirements.txt
index a923e7f..adbdf43 100644
--- a/adi_function_app/requirements.txt
+++ b/adi_function_app/requirements.txt
@@ -9,7 +9,7 @@ pandas
 azure-identity
 openpyxl
 regex
-nltk==3.8.1
+nltk==3.9
 bs4
 azure-search
 azure-search-documents