diff --git a/molecule/requirements.txt b/molecule/requirements.txt
index e5bb4774..278a580a 100644
--- a/molecule/requirements.txt
+++ b/molecule/requirements.txt
@@ -6,3 +6,4 @@ openshift!=0.13.0
 jmespath
 ansible-core
 ansible-compat<4  # https://github.com/ansible-community/molecule/issues/3903
+Cython<3  # https://github.com/yaml/pyyaml/issues/601