diff --git a/requirements.txt b/requirements.txt
index 07d9709..524aeb4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ pyaml==19.4.1
 python-dateutil==2.7.5
 python-mimeparse==1.6.0
 python-slugify==3.0.2
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 six==1.12.0
 testtools==2.3.0