diff --git a/requirements_dev.txt b/requirements_dev.txt
index eb0e7db..182b1d1 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -13,7 +13,7 @@ coveralls~=1.1
 discover==0.4.0
 
 # used in travis_pypi_setup.py
-PyYAML==3.12
+PyYAML==5.4
 
 # doc-related
 docutils==0.13.1