diff --git a/appveyor.yml b/appveyor.yml
index d2dc73739..1f3f30911 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,4 @@
 version: 1.0.{build}
-os: Previous Windows Server 2012 R2
 configuration: Debug
 clone_depth: 50
 before_build: