diff --git a/.travis.yml b/.travis.yml
index 52a80ec9..f0d20524 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,20 +3,21 @@ cache:
   apt: true
   directories:
     - $HOME/Library/Caches/Homebrew
+os:
+  - linux
+  - osx
 matrix:
   include:
     - os: linux
       dist: xenial
       sudo: required
-      env: BUILD_TYPE=Release UPNP=ON
-    - os: linux
-      dist: xenial
-      sudo: required
-      env: BUILD_TYPE=Release UPNP=OFF
     - os: osx
       env: UPNP=yes
     - os: osx
       env: UPNP=no
+  env:
+    - BUILD_TYPE=Release UPNP=ON
+    - BUILD_TYPE=Release UPNP=OFF
 addons:
   apt:
     packages:
@@ -38,7 +39,7 @@ compiler:
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update ; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install libressl miniupnpc ; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew outdated <package-name> || brew upgrade <package-name> ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew upgrade boost ; fi
 script:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then cd build && cmake -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DWITH_UPNP=${UPNP} && make ; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]];   then make HOMEBREW=1 USE_UPNP=${UPNP} ; fi