diff --git a/requirements.txt b/requirements.txt
index cb5f8e7..bfd844f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ pathtools==0.1.2
 pkginfo==1.4.1
 port-for==0.3.1
 Pygments==2.2.0
-PyYAML==3.12
+PyYAML==5.4
 six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==1.5.3