diff --git a/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json b/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json
index bdda62d981..b3571039e2 100644
--- a/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json
+++ b/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json
@@ -18,9 +18,11 @@
     "netstandard1.3": {
       "dependencies": {
         "System.Diagnostics.Contracts": "4.0.1-*",
+        "System.Globalization": "4.0.11-*",
         "System.IO": "4.1.0-*",
         "System.Linq": "4.1.0-*",
         "System.Net.WebSockets": "4.0.0-*",
+        "System.Resources.ResourceManager": "4.0.1-*",
         "System.Runtime.InteropServices": "4.1.0-*",
         "System.Runtime.Extensions": "4.1.0-*",
         "System.Security.Cryptography.Algorithms": "4.1.0-*",