diff --git a/src/Microsoft.AspNet.Security.DataProtection/project.json b/src/Microsoft.AspNet.Security.DataProtection/project.json
index 305c38f2f1..b12bf80f25 100644
--- a/src/Microsoft.AspNet.Security.DataProtection/project.json
+++ b/src/Microsoft.AspNet.Security.DataProtection/project.json
@@ -3,23 +3,23 @@
   "frameworks": {
     "net45": {
         "frameworkAssemblies": {
-            "System.Security": "4.0.0.0"
+            "System.Security": "4.0.0-beta-*"
         }
     },
     "aspnetcore50": {
       "dependencies": {
-        "System.Diagnostics.Debug": "4.0.10.0",
-        "System.Diagnostics.Tools": "4.0.0.0",
-        "System.Globalization": "4.0.10.0",
-        "System.Linq": "4.0.0.0",
-        "System.Reflection": "4.0.10.0",
-        "System.Resources.ResourceManager": "4.0.0.0",
-        "System.Runtime": "4.0.20.0",
-        "System.Runtime.Extensions": "4.0.10.0",
-        "System.Runtime.InteropServices": "4.0.20.0",
-        "System.Security.Cryptography.Encryption": "4.0.0.0",
-        "System.Security.Cryptography.Hashing.Algorithms": "4.0.0.0",
-        "System.Text.Encoding.Extensions": "4.0.10.0"
+        "System.Diagnostics.Debug": "4.0.10-beta-*",
+        "System.Diagnostics.Tools": "4.0.0-beta-*",
+        "System.Globalization": "4.0.10-beta-*",
+        "System.Linq": "4.0.0-beta-*",
+        "System.Reflection": "4.0.10-beta-*",
+        "System.Resources.ResourceManager": "4.0.0-beta-*",
+        "System.Runtime": "4.0.20-beta-*",
+        "System.Runtime.Extensions": "4.0.10-beta-*",
+        "System.Runtime.InteropServices": "4.0.20-beta-*",
+        "System.Security.Cryptography.Encryption": "4.0.0-beta-*",
+        "System.Security.Cryptography.Hashing.Algorithms": "4.0.0-beta-*",
+        "System.Text.Encoding.Extensions": "4.0.10-beta-*"
       }
     }
   },