diff --git a/appveyor.yml b/appveyor.yml
index d5cc1620..892b3163 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -4,6 +4,7 @@ branches:
   - coverity_scan
 skip_tags: true
 clone_depth: 50
+os: Previous Windows Server 2012 R2
 environment:
   matrix:
   - OPJ_CI_ARCH: x86