diff --git a/requirements.txt b/requirements.txt
index af311aa4c7..293d167b37 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ numpy>=1.17.2
 torch>=1.4
 future>=0.17.1  # required for builtins in setup.py
 tqdm>=4.41.0
-PyYAML>=5.1,<=5.4.1
+PyYAML>=5.1
 fsspec[http]>=2021.05.0, !=2021.06.0
 tensorboard>=2.2.0, !=2.5.0  # 2.5.0 GPU CI error: 'Couldn't build proto file into descriptor pool!'
 torchmetrics>=0.4.0