diff --git a/src/Microsoft.AspNet.TestHost/project.json b/src/Microsoft.AspNet.TestHost/project.json
index ee0ffcfd3f..86f2d33e78 100644
--- a/src/Microsoft.AspNet.TestHost/project.json
+++ b/src/Microsoft.AspNet.TestHost/project.json
@@ -11,7 +11,7 @@
         },
         "aspnetcore50": {
             "dependencies": {
-                "System.Diagnostics.Contracts": "4.0.0-beta",
+                "System.Diagnostics.Contracts": "4.0.0-beta-*",
                 "System.Net.Http": "4.0.0-beta-*"
             }
         }