diff --git a/pyproject.toml b/pyproject.toml
index 3b2f4e421a9d..a067ca4b86a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
     "colorama>=0.2.5,<0.4.7",
     "docutils>=0.10,<0.20",
     "cryptography>=3.3.2,<40.0.2",
-    "ruamel.yaml>=0.15.0,<=0.17.21",
+    "ruamel.yaml>=0.15.0,<=0.18.6",
     # ruamel.yaml only requires ruamel.yaml.clib for Python versions
     # less than or equal to Python 3.10. In order to ensure we have
     # a consistent dependency closure across all Python versions,