diff --git a/src/Microsoft.AspNet.Hosting/project.json b/src/Microsoft.AspNet.Hosting/project.json
index 81c7525f8e..a44b68f284 100644
--- a/src/Microsoft.AspNet.Hosting/project.json
+++ b/src/Microsoft.AspNet.Hosting/project.json
@@ -29,23 +29,11 @@
     "System.Diagnostics.DiagnosticSource": "4.0.0-*"
   },
   "frameworks": {
-    "dnx451": {
-      "frameworkAssemblies": {
-        "System.Runtime": ""
-      }
-    },
     "net451": {
       "frameworkAssemblies": {
         "System.Runtime": { "type": "build" }
       }
     },
-    "dnxcore50": {
-      "dependencies": {
-        "System.Console": "4.0.0-*",
-        "System.Diagnostics.StackTrace": "4.0.1-*",
-        "System.Reflection.Extensions": "4.0.1-*"
-      }
-    },
     "dotnet5.4": {
       "dependencies": {
         "System.Console": "4.0.0-*",