diff --git a/requirements.txt b/requirements.txt
index 4cc63cd..68df3f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ lxml==4.4.2
 MarkupSafe==1.1.1
 python-dateutil==2.8.1
 python-frontmatter==0.5.0
-PyYAML==5.2
+PyYAML==5.4
 requests==2.22.0
 six==1.13.0
 unicode-slugify==0.1.3