diff --git a/.github/appveyor.yml b/.github/appveyor.yml
index b809ad680b1498..2cd9a42feb8d2f 100644
--- a/.github/appveyor.yml
+++ b/.github/appveyor.yml
@@ -5,6 +5,8 @@ branches:
     - master
     - /\d\.\d/
     - buildbot-custom
+cache:
+  - externals -> PCbuild\*
 build_script:
 - cmd: PCbuild\build.bat -e
 - cmd: PCbuild\python.exe -m test.pythoninfo