diff --git a/appveyor.yml b/appveyor.yml
index 8ff7a866ea..c9a6725e5e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,7 @@
 # Build version
 version: "{build}"
+# shallow clone the main repo
+clone_depth: 1
 
 branches:
   only: