diff --git a/samples/CookieSessionSample/Startup.cs b/samples/CookieSessionSample/Startup.cs
index c5359a05f3..32721afb05 100644
--- a/samples/CookieSessionSample/Startup.cs
+++ b/samples/CookieSessionSample/Startup.cs
@@ -8,7 +8,7 @@ namespace CookieSessionSample
 {
     public class Startup
     {
-        public void Configure(IBuilder app)
+        public void Configure(IApplicationBuilder app)
         {
             app.UseCookieAuthentication(new CookieAuthenticationOptions()
             {