diff --git a/requirements.txt b/requirements.txt
index d4adc42..8536fc7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ pylint==2.3.1
 pyparsing==2.4.0
 pysha3==1.0.2
 python-dateutil==2.8.0
-PyYAML==5.1.1
+PyYAML==5.4
 repoze.lru==0.7
 requests==2.22.0
 rlp==1.1.0