diff --git a/pyproject.toml b/pyproject.toml
index 3102768a..77630a69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,7 +69,7 @@ development = [
     'pydocstyle==6.3.0',
     'radon==6.0.1',
     'xenon==0.9.3',
-    'types-PyYAML==6.0.12.20260510',
+    'types-PyYAML==6.0.12.20260518',
     'codespell==2.4.2',
     'mypy==2.1.0',
     #'flake8==5.0.4', # version 6.x.x requires python >= 3.8.1 (but 3.7 support window is until 2023-06-27)