diff --git a/.travis.yml b/.travis.yml
index 4d4dc50..1398d31 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -179,7 +179,7 @@ matrix:
 install:
   - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
   - cd ..
-  - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
+  - git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
   - cd boost-root
   - git submodule update --init tools/build
   - git submodule update --init libs/config
diff --git a/appveyor.yml b/appveyor.yml
index 9c8ac09..299443a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -26,7 +26,7 @@ install:
   - set BOOST_BRANCH=develop
   - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
   - cd ..
-  - git clone -b %BOOST_BRANCH% https://github.com/boostorg/boost.git boost-root
+  - git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
   - cd boost-root
   - git submodule update --init tools/build
   - git submodule update --init libs/config