diff --git a/pyproject.toml b/pyproject.toml
index 53749bc..465bf9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ dependencies = [
     "h5py>=3.10",
     "numpy>=2.0",
     "jsonschema>=4.20",
-    "pyyaml>=6.0",
+    "pyyaml>=6.0.3",
     "tomli-w>=1.0",
     "click>=8.0",
 ]