diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9a7399c..54fb0e7 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
-PyYAML==3.11
+PyYAML==5.4
 cov-core==1.15.0
 coverage==3.7.1
 coveralls==0.5