diff --git a/stable/prometheus-operator/hack/requirements.txt b/stable/prometheus-operator/hack/requirements.txt
index bc2fde78b564..91a83073ce94 100644
--- a/stable/prometheus-operator/hack/requirements.txt
+++ b/stable/prometheus-operator/hack/requirements.txt
@@ -1,2 +1,2 @@
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0