diff --git a/pyproject.toml b/pyproject.toml
index 013d9bbc..bf210e88 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,7 +103,7 @@ optional-dependencies.dev = [
     "vws-python==2025.3.10.1",
     "vws-test-fixtures==2023.3.5",
     "vws-web-tools==2024.10.6.1",
-    "yamlfix==1.18.0",
+    "yamlfix==1.19.0",
 ]
 optional-dependencies.release = [ "check-wheel-contents==0.6.3" ]
 urls.Documentation = "https://vws-python.github.io/vws-python-mock/"