diff --git a/src/Microsoft.AspNetCore.Server.Testing/project.json b/src/Microsoft.AspNetCore.Server.Testing/project.json
index 2889b5713d..84dba20d54 100644
--- a/src/Microsoft.AspNetCore.Server.Testing/project.json
+++ b/src/Microsoft.AspNetCore.Server.Testing/project.json
@@ -46,11 +46,11 @@
       "dependencies": {
         "System.Diagnostics.Process": "4.1.0-*",
         "System.IO.FileSystem": "4.0.1-*",
-        "System.Net.Http": "4.1.0-*",
+        "System.Net.Http": "4.0.1-*",
         "System.Net.Primitives": "4.0.11-*",
         "System.Net.Sockets": "4.1.0-*",
         "System.Runtime.Extensions": "4.1.0-*",
-        "System.Text.RegularExpressions": "4.1.0-*",
+        "System.Text.RegularExpressions": "4.0.12-*",
         "System.Threading": "4.0.11-*",
         "System.Threading.Thread": "4.0.0-*"
       },