diff --git a/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json b/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json
index 8cb70926b9..8168b11212 100644
--- a/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json
+++ b/src/Microsoft.AspNetCore.WebSockets.Protocol/project.json
@@ -17,7 +17,6 @@
         "System.IO": "4.1.0-*",
         "System.Linq": "4.0.1-*",
         "System.Net.WebSockets": "4.0.0-*",
-        "System.Runtime": "4.0.21-*",
         "System.Runtime.InteropServices": "4.0.21-*",
         "System.Runtime.Extensions": "4.1.0-*",
         "System.Security.Cryptography.Algorithms": "4.0.0-*",
diff --git a/src/Microsoft.AspNetCore.WebSockets.Server/project.json b/src/Microsoft.AspNetCore.WebSockets.Server/project.json
index bd3c467577..f15bfed16e 100644
--- a/src/Microsoft.AspNetCore.WebSockets.Server/project.json
+++ b/src/Microsoft.AspNetCore.WebSockets.Server/project.json
@@ -18,7 +18,6 @@
     "net451": {},
     "dotnet5.4": {
       "dependencies": {
-        "System.Runtime": "4.0.21-*"
       }
     }
   }