diff --git a/requirements.txt b/requirements.txt
index 5e35e02..4eee5c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ port-for==0.3.1
 Pygments==2.3.1
 pyparsing==2.3.1
 pytz==2018.9
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 six==1.12.0
 snowballstemmer==1.2.1