diff --git a/packages/@aws-cdk/aws-lambda-python-alpha/test/lambda-handler-custom-build/requirements.txt b/packages/@aws-cdk/aws-lambda-python-alpha/test/lambda-handler-custom-build/requirements.txt
index 0aa32d43ec53c..2f60144495f36 100644
--- a/packages/@aws-cdk/aws-lambda-python-alpha/test/lambda-handler-custom-build/requirements.txt
+++ b/packages/@aws-cdk/aws-lambda-python-alpha/test/lambda-handler-custom-build/requirements.txt
@@ -2,6 +2,6 @@
 certifi==2023.7.22
 chardet==3.0.4
 idna==2.10
-urllib3==1.26.7
+urllib3==1.26.17
 # Requests used by this lambda
 requests==2.31.0