diff --git a/codalab/requirements/requirements.txt b/codalab/requirements/requirements.txt
index c0e187733..53502ecc3 100644
--- a/codalab/requirements/requirements.txt
+++ b/codalab/requirements/requirements.txt
@@ -31,7 +31,7 @@ psutil==5.7.2
 python-openid==2.2.5
 python-ptrace==0.6.5
 pytz==2015.7
-PyYAML==5.1
+PyYAML==6.0
 requests-oauthlib==0.3.2
 requests==2.24.0
 six==1.10.0