diff --git a/src/Microsoft.AspNet.WebSockets.Protocol/project.json b/src/Microsoft.AspNet.WebSockets.Protocol/project.json
index 0e0cd0d784..b525974346 100644
--- a/src/Microsoft.AspNet.WebSockets.Protocol/project.json
+++ b/src/Microsoft.AspNet.WebSockets.Protocol/project.json
@@ -13,6 +13,7 @@
                 "System.Runtime.InteropServices": "4.0.20-beta-*",
                 "System.Runtime.Extensions": "4.0.10-beta-*",
                 "System.Security.Cryptography.Encryption": "4.0.0-beta-*",
+                "System.Security.Cryptography.Hashing": "4.0.0-beta-*",
                 "System.Security.Cryptography.Hashing.Algorithms": "4.0.0-beta-*",
                 "System.Text.Encoding.Extensions": "4.0.10-beta-*",
                 "System.Threading": "4.0.10-beta-*",