diff --git a/contributing/samples/authn-adk-all-in-one/requirements.txt b/contributing/samples/authn-adk-all-in-one/requirements.txt
index 777d8d52bb..cd6a022709 100644
--- a/contributing/samples/authn-adk-all-in-one/requirements.txt
+++ b/contributing/samples/authn-adk-all-in-one/requirements.txt
@@ -1,6 +1,6 @@
 google-adk==1.12
 Flask==3.1.3
 flask-cors==6.0.1
-python-dotenv==1.1.1
+python-dotenv==1.2.2
 PyJWT[crypto]==2.10.1
 requests==2.32.4
\ No newline at end of file