diff --git a/src/AutoRunners/BindWithRunnerAttribute.cs b/src/AutoRunners/BindWithRunnerAttribute.cs
index 978c41a..4facf65 100644
--- a/src/AutoRunners/BindWithRunnerAttribute.cs
+++ b/src/AutoRunners/BindWithRunnerAttribute.cs
@@ -1,6 +1,6 @@
 using System;
 [AttributeUsage(AttributeTargets.Interface, Inherited = false, AllowMultiple = false)]
-sealed class BindWithRunnerAttribute : Attribute
+public sealed class BindWithRunnerAttribute : Attribute
 {
     public readonly Type runnerType;
     public BindWithRunnerAttribute(Type runnerType)