diff --git a/src/Microsoft.AspNetCore.DataProtection/project.json b/src/Microsoft.AspNetCore.DataProtection/project.json
index 3de43d75f1..55fb22e14b 100644
--- a/src/Microsoft.AspNetCore.DataProtection/project.json
+++ b/src/Microsoft.AspNetCore.DataProtection/project.json
@@ -19,8 +19,6 @@
   "frameworks": {
     "net451": {
       "frameworkAssemblies": {
-        "System.IO": "",
-        "System.Runtime": "",
         "System.Security": "",
         "System.Xml": "",
         "System.Xml.Linq": ""