diff --git a/python-lambda/requirements.txt b/python-lambda/requirements.txt
index e34ace5..b8b97f2 100644
--- a/python-lambda/requirements.txt
+++ b/python-lambda/requirements.txt
@@ -6,5 +6,5 @@ futures==3.0.5
 jmespath==0.9.0
 pyaml==15.8.2
 python-dateutil==2.5.3
-PyYAML==5.1
+PyYAML==5.4
 six==1.10.0