diff --git a/requirements.txt b/requirements.txt
index bc541d4..bd759a1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ pexpect==4.7.0
 Pillow>=6.2.0
 py-gfm==0.1.4
 py-rouge==1.1
-pyyaml==5.1
+pyyaml==5.4
 pyzmq==18.1.0
 regex==2019.8.19
 recommonmark==0.6.0