diff --git a/backend/Directory.Packages.props b/backend/Directory.Packages.props
index 7467dbb..18dce95 100644
--- a/backend/Directory.Packages.props
+++ b/backend/Directory.Packages.props
@@ -43,7 +43,7 @@
     <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.15.1" />
     <!-- LLM / Prompt -->
     <PackageVersion Include="Anthropic" Version="12.22.0" />
-    <PackageVersion Include="YamlDotNet" Version="17.1.0" />
+    <PackageVersion Include="YamlDotNet" Version="18.0.0" />
     <!-- Configuration (eval tests) -->
     <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="10.0.8" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.Json" Version="10.0.8" />