diff --git a/.travis.yml b/.travis.yml
index a3c6afd..7265740 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,22 +1,25 @@
 ## Documentation: http://docs.travis-ci.com/user/languages/julia/
 language: julia
+
 os:
   - linux
   - osx
+
 julia:
-  - 1.0
+  - 1.1
   - nightly
+
 notifications:
   email: false
-git:
-  depth: 99999999
 
-## uncomment the following lines to allow failures on nightly julia
-## (tests will run but not make your overall status red)
 matrix:
   allow_failures:
     - julia: nightly
 
+addons:
+  apt:
+      packages:
+      - gnuplot5
 
 ## uncomment the following lines to override the default test script
 #script: