diff --git a/src/Microsoft.AspNet.WebSockets.Protocol/project.json b/src/Microsoft.AspNet.WebSockets.Protocol/project.json
index 784a1dc044..0a600cfc61 100644
--- a/src/Microsoft.AspNet.WebSockets.Protocol/project.json
+++ b/src/Microsoft.AspNet.WebSockets.Protocol/project.json
@@ -10,7 +10,7 @@
             "System.Runtime": "4.0.20.0",
             "System.Runtime.InteropServices": "4.0.20.0",
             "System.Runtime.Extensions": "4.0.10.0",
-            "System.Security.Cryptography": "4.0.0.0",
+            "System.Security.Cryptography.Encryption": "4.0.0.0",
             "System.Security.Cryptography.Hashing.Algorithms": "4.0.0.0",
             "System.Threading": "4.0.0.0",
             "System.Threading.Tasks": "4.0.10.0",