diff --git a/pyproject.toml b/pyproject.toml
index ebe346b..ea27c72 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ readme = "README.md"
 
 [tool.poetry.dependencies]
 python = ">=3.8,<4"
-"ruamel.yaml" = "0.16.0"
+"ruamel.yaml" = "0.18.6"
 
 [tool.poetry.scripts]
 yaml_shellcheck = "yaml_shellcheck:main"