diff --git a/appveyor.yml b/appveyor.yml
index 330bcfe..fa82bce 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -41,3 +41,5 @@ after_test: python ../ci_boost_library_test.py after_test
 on_success: python ../ci_boost_library_test.py on_success
 on_failure: python ../ci_boost_library_test.py on_failure
 on_finish: python ../ci_boost_library_test.py on_finish
+cache:
+  - C:\projects\boostorg\boost -> appveyor.yml