diff --git a/test/Microsoft.AspNet.Razor.Test/project.json b/test/Microsoft.AspNet.Razor.Test/project.json
index 7462dd81ba..0918d1cd7c 100644
--- a/test/Microsoft.AspNet.Razor.Test/project.json
+++ b/test/Microsoft.AspNet.Razor.Test/project.json
@@ -15,7 +15,8 @@
         "dnxcore50": {
             "dependencies": {
                 "System.Diagnostics.TraceSource": "4.0.0-beta-*",
-                "System.Reflection.TypeExtensions": "4.0.0-beta-*"
+                "System.Reflection.TypeExtensions": "4.0.0-beta-*",
+                "System.Runtime.Serialization.Primitives": "4.0.10-beta-*"
             }
         }
     },