diff --git a/.travis.yml b/.travis.yml
index f6d1db746..1c88eaee8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,8 +27,8 @@ matrix:
 # install dependencies
 install:
   - sudo apt-get update -qq
-  - if [ $CODE_BUILD ]; then sudo apt-get install libx11-dev mesa-common-dev libgl1-mesa-dev qt5-default libqt5x11extras5-dev libxcb-keysyms1-dev ; fi
-  - if [ $DOCS_BUILD ]; then sudo apt-get install python-sphinx python-sphinx-rtd-theme ; fi
+  - if [ $CODE_BUILD ]; then sudo apt-get install -y -qq libx11-dev mesa-common-dev libgl1-mesa-dev qt5-default libqt5x11extras5-dev libxcb-keysyms1-dev ; fi
+  - if [ $DOCS_BUILD ]; then sudo apt-get install -y -qq python-sphinx python-sphinx-rtd-theme ; fi
 
 script:
   - sh ./hash_version.sh