diff --git a/requirements.txt b/requirements.txt
index fe4b31c..e740a2e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 lxml==4.2.1
 Mako==1.0.7
 MarkupSafe==1.0
-PyYAML==5.1
+PyYAML==5.4