diff --git a/.travis.yml b/.travis.yml
index af15910d6..9c1389fa3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1014,6 +1014,8 @@ install:
   - cd boost-root
   - git submodule update --init tools/build
   - git submodule update --init libs/config
+  - git submodule update --init tools/boost_install
+  - git submodule update --init libs/headers
   - git submodule update --init tools/boostdep
   - cp -r $TRAVIS_BUILD_DIR/* libs/multiprecision
   - python tools/boostdep/depinst/depinst.py multiprecision
diff --git a/appveyor.yml b/appveyor.yml
index f68aacf04..59073b522 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -82,6 +82,8 @@ install:
   - git clone -b %APPVEYOR_REPO_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
   - cd boost-root
   - git submodule update --init tools/build
+  - git submodule update --init tools/boost_install
+  - git submodule update --init libs/headers
   - git submodule update --init libs/config
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\multiprecision
   - git submodule update --init tools/boostdep