diff --git a/.travis.yml b/.travis.yml
index a702a656..4c3f3758 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,8 +3,6 @@
 
 language: cpp
 
-sudo: false
-
 python: "2.7"
 
 branches:
@@ -215,6 +213,8 @@ install:
   - cd ..
   - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost
   - cd boost
+  - git submodule update --init tools/boost_install
+  - git submodule update --init libs/headers
   - git submodule update --init tools/build
   - git submodule update --init libs/config
   - git submodule update --init tools/boostdep
diff --git a/appveyor.yml b/appveyor.yml
index 65f06ca5..1a5008d4 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -32,6 +32,8 @@ install:
   - cd ..
   - git clone -b %BOOST_BRANCH% https://github.com/boostorg/boost.git boost
   - cd boost
+  - git submodule update --init tools/boost_install
+  - git submodule update --init libs/headers
   - git submodule update --init tools/build
   - git submodule update --init libs/config
   - git submodule update --init tools/boostdep