diff --git a/appveyor.yml b/appveyor.yml
index c5bb4a18e..c2968840a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,8 @@
 os: Visual Studio 2019
 
+init:
+ - netsh int ipv4 set dynamicport tcp start=1025 num=64510
+
 before_build:
   - nuget restore src\Renci.SshNet.VS2019.sln