diff --git a/appveyor.yml b/appveyor.yml
index 3514db1..9b053a8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -10,6 +10,8 @@ assembly_info:
   assembly_version: '{version}'
   assembly_file_version: '{version}'
   assembly_informational_version: '{version}'
+install:
+- ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/fix-xamarin-4-2-2-11.ps1'))
 nuget:
   disable_publish_on_pr: true
 build_script: