diff --git a/pyproject.toml b/pyproject.toml
index 241e9ef..4d518fd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
         "matplotlib>=3.5",
         "networkx>=3.0",
         "numpy>=1.23",
-        "pyyaml>=3.0",
+        "pyyaml>=6.0.3",
         "scipy>=1.10",
         "smokesignal>=0.7",
 ]