diff --git a/ai-sample/TokenizeDocFunction/requirements.txt b/ai-sample/TokenizeDocFunction/requirements.txt
index 1387373..6ababc5 100644
--- a/ai-sample/TokenizeDocFunction/requirements.txt
+++ b/ai-sample/TokenizeDocFunction/requirements.txt
@@ -5,4 +5,4 @@
 azure-functions
 langchain==0.0.326
 tiktoken==0.5.1
-pypdf==3.15.5
+pypdf==6.6.2