diff --git a/appveyor.yml b/appveyor.yml
index ecea6c5fa3c..2d6135c7a29 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,6 @@
 version: '{build}'
+environment:
+  APPVEYOR_CACHE_ENTRY_ZIP_ARGS: "-t7z -m0=lzma -mx=9"
 configuration:
 - MINGW_64
 - MINGW_32