diff --git a/src/Microsoft.AspNet.Razor.Runtime/project.json b/src/Microsoft.AspNet.Razor.Runtime/project.json
index 052cfa9358..aea9c93f85 100644
--- a/src/Microsoft.AspNet.Razor.Runtime/project.json
+++ b/src/Microsoft.AspNet.Razor.Runtime/project.json
@@ -7,7 +7,7 @@
         "net45": { },
         "aspnetcore50": { 
             "dependencies": {
-                "System.Reflection.Extensions": "4.0.0.0"
+                "System.Reflection.Extensions": "4.0.0-beta-*"
             }
         }
     }
diff --git a/src/Microsoft.AspNet.Razor/project.json b/src/Microsoft.AspNet.Razor/project.json
index 122c563af3..68f0cfeb7f 100644
--- a/src/Microsoft.AspNet.Razor/project.json
+++ b/src/Microsoft.AspNet.Razor/project.json
@@ -4,22 +4,22 @@
         "net45": { },
         "aspnetcore50": {
             "dependencies": {
-                "System.Collections": "4.0.10.0",
-                "System.Diagnostics.Debug": "4.0.10.0",
-                "System.Diagnostics.Tools": "4.0.0.0",
-                "System.Globalization": "4.0.10.0",
-                "System.IO": "4.0.10.0",
-                "System.IO.FileSystem": "4.0.0.0",
-                "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.Threading": "4.0.0.0",
-                "System.Threading.Tasks": "4.0.10.0",
-                "System.Threading.Thread": "4.0.0.0",
-                "System.Security.Cryptography.Hashing.Algorithms": "4.0.0.0"
+                "System.Collections": "4.0.10-beta-*",
+                "System.Diagnostics.Debug": "4.0.10-beta-*",
+                "System.Diagnostics.Tools": "4.0.0-beta-*",
+                "System.Globalization": "4.0.10-beta-*",
+                "System.IO": "4.0.10-beta-*",
+                "System.IO.FileSystem": "4.0.0-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.Threading": "4.0.0-beta-*",
+                "System.Threading.Tasks": "4.0.10-beta-*",
+                "System.Threading.Thread": "4.0.0-beta-*",
+                "System.Security.Cryptography.Hashing.Algorithms": "4.0.0-beta-*"
             }
         }
     }