diff --git a/aws/lambda-function/sqs-sns_example/requirements.txt b/aws/lambda-function/sqs-sns_example/requirements.txt
index 7f99649..7b6a25f 100644
--- a/aws/lambda-function/sqs-sns_example/requirements.txt
+++ b/aws/lambda-function/sqs-sns_example/requirements.txt
@@ -11,7 +11,7 @@ pyaml==15.8.2
 python-dateutil==2.5.3
 python-dotenv==0.9.1
 python-lambda==3.2.2
-PyYAML==5.1
+PyYAML==5.4
 requests==2.20.0
 s3transfer==0.1.13
 six==1.10.0