diff --git a/requirements.txt b/requirements.txt
index f0b035b..53b9f77 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ port-for==0.3.1
 Pygments==2.4.2
 pyparsing==2.4.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 six==1.12.0
 snowballstemmer==1.9.0