diff --git a/requirements/test.txt b/requirements/test.txt
index 25f85ac..ddd11da 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -18,7 +18,7 @@ prompt-toolkit==1.0.15
 ptyprocess==0.5.2
 py==1.5.2
 Pygments==2.2.0
-PyYAML==3.12
+PyYAML==5.4
 simplegeneric==0.8.1
 six==1.11.0
 traitlets==4.3.2