diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5ac74fb..f0b1313 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,4 +1,4 @@
-PyYAML==5.3.1
+PyYAML==5.4
 argh==0.26.1
 colorama==0.3.3
 coverage==4.0.1