diff --git a/src/Microsoft.AspNet.Security.DataProtection/project.json b/src/Microsoft.AspNet.Security.DataProtection/project.json
index fee9e2a689..305c38f2f1 100644
--- a/src/Microsoft.AspNet.Security.DataProtection/project.json
+++ b/src/Microsoft.AspNet.Security.DataProtection/project.json
@@ -2,8 +2,8 @@
   "version": "1.0.0-*",
   "frameworks": {
     "net45": {
-        "dependencies": {
-            "System.Security": ""
+        "frameworkAssemblies": {
+            "System.Security": "4.0.0.0"
         }
     },
     "aspnetcore50": {