diff --git a/.travis.yml b/.travis.yml
index 2e3853c..d93162d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ before_install: |-
                 fi
                 if [ "$TRAVIS_OS_NAME" == "linux" ]
                 then
+                    sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
                     sudo add-apt-repository -y ppa:beineri/opt-qt532
                     sudo add-apt-repository -y ppa:kubuntu-ppa/backports
                     sudo apt-get -qq update