diff --git a/appveyor.yml b/appveyor.yml
index b98be232..dd1c9e01 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -66,6 +66,9 @@ install:
   - git submodule init libs/utility
   - git submodule init libs/variant
   - git submodule init libs/winapi
+  - git submodule init tools/boost_install
+  - git submodule init libs/headers
+
   - git submodule init tools/build
   - git submodule update
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\serialization