diff --git a/src/Microsoft.AspNet.StaticFiles/StreamCopyOperation.cs b/src/Microsoft.AspNet.StaticFiles/StreamCopyOperation.cs
index c272b3eab0..7498a8bc9f 100644
--- a/src/Microsoft.AspNet.StaticFiles/StreamCopyOperation.cs
+++ b/src/Microsoft.AspNet.StaticFiles/StreamCopyOperation.cs
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using System.Diagnostics.Contracts;
+using System.Diagnostics;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
@@ -19,10 +19,10 @@ namespace Microsoft.AspNet.StaticFiles
             long? bytesRemaining = length;
             byte[] buffer = new byte[DefaultBufferSize];
 
-            Contract.Assert(source != null);
-            Contract.Assert(destination != null);
-            Contract.Assert(!bytesRemaining.HasValue || bytesRemaining.Value >= 0);
-            Contract.Assert(buffer != null);
+            Debug.Assert(source != null);
+            Debug.Assert(destination != null);
+            Debug.Assert(!bytesRemaining.HasValue || bytesRemaining.Value >= 0);
+            Debug.Assert(buffer != null);
 
             while (true)
             {
diff --git a/src/Microsoft.AspNet.StaticFiles/project.json b/src/Microsoft.AspNet.StaticFiles/project.json
index aa56171bce..e892078243 100644
--- a/src/Microsoft.AspNet.StaticFiles/project.json
+++ b/src/Microsoft.AspNet.StaticFiles/project.json
@@ -2,32 +2,12 @@
     "version": "1.0.0-*",
     "description": "ASP.NET 5 static files middleware.",
     "dependencies": {
-        "Microsoft.AspNet.FileSystems.Interfaces": { "version": "1.0.0-*", "type": "build" },
         "Microsoft.AspNet.Hosting": { "version": "1.0.0-*", "type": "build" },
-        "Microsoft.AspNet.Http": "1.0.0-*",
         "Microsoft.AspNet.Http.Extensions": "1.0.0-*",
-        "Microsoft.AspNet.HttpFeature": { "version": "1.0.0-*", "type": "build" },
-        "Microsoft.Framework.Logging": "1.0.0-*"
+        "Microsoft.AspNet.HttpFeature": { "version": "1.0.0-*", "type": "build" }
     },
     "frameworks": {
         "aspnet50": { },
-        "aspnetcore50": {
-            "dependencies": {
-                "System.Collections": "4.0.10-beta-*",
-                "System.Diagnostics.Contracts": "4.0.0-beta-*",
-                "System.Diagnostics.Debug": "4.0.10-beta-*",
-                "System.Diagnostics.Tools": "4.0.0-beta-*",
-                "System.Globalization": "4.0.10-beta-*",
-                "System.IO": "4.0.10-beta-*",
-                "System.Linq": "4.0.0-beta-*",
-                "System.Reflection": "4.0.10-beta-*",
-                "System.Resources.ResourceManager": "4.0.0-beta-*",
-                "System.Runtime": "4.0.20-beta-*",
-                "System.Runtime.Extensions": "4.0.10-beta-*",
-                "System.Runtime.InteropServices": "4.0.20-beta-*",
-                "System.Text.Encoding": "4.0.10-beta-*",
-                "System.Threading.Tasks": "4.0.10-beta-*"
-            }
-        }
+        "aspnetcore50": { }
     }
 }
diff --git a/test/Microsoft.AspNet.StaticFiles.Tests/Project.json b/test/Microsoft.AspNet.StaticFiles.Tests/project.json
similarity index 100%
rename from test/Microsoft.AspNet.StaticFiles.Tests/Project.json
rename to test/Microsoft.AspNet.StaticFiles.Tests/project.json