diff --git a/package/osx/travis-build-cpp.sh b/package/osx/travis-build-cpp.sh
index 89d000fb7..ba43a1ebe 100755
--- a/package/osx/travis-build-cpp.sh
+++ b/package/osx/travis-build-cpp.sh
@@ -8,7 +8,7 @@ mkdir -p $CACHE
 
 ( sudo Xvfb :99 -ac -screen 0 1024x768x8; echo ok )&
 brew update -v
-brew install ccache
+brew upgrade ccache || brew install ccache
 
 if [[ "$WXVERSION" != "pkg" ]]; then
     WXVER_EXPANDED=${WXVERSION:0:1}.${WXVERSION:1:1}.${WXVERSION:2:1}
@@ -26,7 +26,7 @@ if [[ "$WXVERSION" != "pkg" ]]; then
     export PATH=${PATH}:${WXDIR}
     cd $TRAVIS_BUILD_DIR # go back to the build dir
 else
-    brew install wxmac # install via homebrew
+    brew upgrade wxmac || brew install wxmac # install via homebrew
 fi
 
 mkdir build && cd build
diff --git a/package/osx/travis-build-main.sh b/package/osx/travis-build-main.sh
index 8ca7e481c..b8b646d6c 100755
--- a/package/osx/travis-build-main.sh
+++ b/package/osx/travis-build-main.sh
@@ -2,7 +2,10 @@
 set -euo pipefail
 
 brew update -v
-brew install boost perl cpanminus wxwidgets
+brew upgrade boost     || brew install boost
+brew upgrade perl      || brew install perl
+brew upgrade cpanminus || brew install cpanminus
+brew upgrade wxwidgets || brew install wxwidgets
 brew link --overwrite perl cpanminus
 
 export SLIC3R_STATIC=1