diff --git a/src/Microsoft.AspNet.Cors.Core/project.json b/src/Microsoft.AspNet.Cors.Core/project.json
index 4b35de1489..046774e265 100644
--- a/src/Microsoft.AspNet.Cors.Core/project.json
+++ b/src/Microsoft.AspNet.Cors.Core/project.json
@@ -5,7 +5,7 @@
          "Microsoft.Framework.DependencyInjection.Abstractions": "1.0.0-*",
          "Microsoft.Framework.OptionsModel": "1.0.0-*",
          "Microsoft.AspNet.Http": "1.0.0-*",
-         "Microsoft.Framework.NotNullAttribute.Internal": { "version": "1.0.0-*", "type": "build" }
+         "Microsoft.Framework.NotNullAttribute.Sources": { "version": "1.0.0-*", "type": "build" }
     },
 
     "frameworks" : {
diff --git a/src/Microsoft.AspNet.Cors/project.json b/src/Microsoft.AspNet.Cors/project.json
index b2e26d0308..3e36184c3c 100644
--- a/src/Microsoft.AspNet.Cors/project.json
+++ b/src/Microsoft.AspNet.Cors/project.json
@@ -4,7 +4,7 @@
         "Microsoft.AspNet.Cors.Core": "1.0.0-*",
         "Microsoft.AspNet.Http.Extensions": "1.0.0-*",
         "Microsoft.AspNet.WebUtilities": "1.0.0-*",
-        "Microsoft.Framework.NotNullAttribute.Internal": { "version": "1.0.0-*", "type": "build" }
+        "Microsoft.Framework.NotNullAttribute.Sources": { "version": "1.0.0-*", "type": "build" }
     },
 
     "frameworks" : {