diff --git a/.travis.yml b/.travis.yml
index c2442cb..ac3b93e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -296,8 +296,9 @@ matrix:
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
 
 install:
+  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
   - cd ..
-  - git clone -b $TRAVIS_BRANCH --depth 1 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 87b0672..fe6d035 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -22,8 +22,10 @@ environment:
       TOOLSET: msvc-14.1
 
 install:
+  - set BOOST_BRANCH=develop
+  - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
   - cd ..
-  - git clone -b %APPVEYOR_REPO_BRANCH% --depth 1 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