diff --git a/SimpleHttpServer/HttpServer.cs b/SimpleHttpServer/HttpServer.cs
index 3bffdc5..b738e30 100644
--- a/SimpleHttpServer/HttpServer.cs
+++ b/SimpleHttpServer/HttpServer.cs
@@ -132,11 +132,12 @@ public sealed class HttpServer {
             }
 
             // stores the check attributes that are defined on the method and on the containing class
-            var requiredChecks = mi.GetCustomAttributes<InternalEndpointCheckAttribute>(true).Concat(mi.DeclaringType?.GetCustomAttributes<InternalEndpointCheckAttribute>(true) ?? Enumerable.Empty<Attribute>())
-                  .Where(a => a.GetType().IsAssignableTo(typeof(InternalEndpointCheckAttribute))).Cast<InternalEndpointCheckAttribute>().ToArray();
+            InternalEndpointCheckAttribute[] requiredChecks = mi.GetCustomAttributes<InternalEndpointCheckAttribute>(true)
+                    .Concat(mi.DeclaringType?.GetCustomAttributes<InternalEndpointCheckAttribute>(true) ?? Enumerable.Empty<Attribute>())
+                    .Where(a => a.GetType().IsAssignableTo(typeof(InternalEndpointCheckAttribute)))
+                    .Cast<InternalEndpointCheckAttribute>().ToArray();
 
-            foreach (var requiredCheck in requiredChecks)
-                requiredCheck.SetInstance(classInstance);
+            InternalEndpointCheckAttribute.Initialize(classInstance, requiredChecks);
 
             foreach (var location in attrib.Locations) {
                 var normLocation = NormalizeUrlPath(location);