diff --git a/.ci/travis-dependencies.sh b/.ci/travis-dependencies.sh
index 68c8855d..070403d6 100644
--- a/.ci/travis-dependencies.sh
+++ b/.ci/travis-dependencies.sh
@@ -2,8 +2,8 @@
 
 if [[ $TRAVIS_OS_NAME == "osx" ]] ; then
   brew update
-  brew install ccache clang-format protobuf qt@5.7
+  brew install ccache clang-format protobuf qt@5.5
 fi
 if [[ $TRAVIS_OS_NAME == "linux" ]] ; then
   echo Skipping... packages are installed with the Travis apt addon for sudo disabled container builds
-fi
\ No newline at end of file
+fi