diff --git a/docs/requirements.txt b/docs/requirements.txt
index a5a16995..ff5518ee 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -53,7 +53,7 @@ pyOpenSSL==17.5.0
 pyparsing==2.2.0
 python-dateutil==2.7.2
 pytz==2017.3
-PyYAML==5.1
+PyYAML==5.4
 reportlab==3.4.0
 requests==2.21.0
 ruamel.ordereddict==0.4.13