diff --git a/requirements.txt b/requirements.txt
index 2015e72..4c21c62 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ py==1.10.0
 pyglet==1.5.16
 pytest==6.2.3
 python-dateutil==2.8.1
-PyYAML==3.13
+PyYAML==5.4.1
 redis==3.2.0
 six==1.12.0
 tmx==1.10