diff --git a/.travis.yml b/.travis.yml
index 9c8ef1a..75b4780 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,24 +17,27 @@ env:
     - dist: trusty
       r_check_args: '--ignore-vignettes'
       r_build_args: '--no-build-vignettes'
-      addons:
-        apt:
-          update: true
-          sources:
-            - sourceline: 'ppa:opencpu/imagemagick'
-          packages:
-            - libmagick++-dev
-            - librsvg2-dev
-            - libwebp-dev
-            - libpoppler-cpp-dev
-            - libtesseract-dev
-            - libleptonica-dev
-            - tesseract-ocr-eng
-            - r-cran-rgdal
-            - libfftw3-dev
-            - cargo
-          bioc_packages:
-            - EBImage
+
+addons:
+   apt:
+     update: true
+     sources:
+       - sourceline: 'ppa:opencpu/imagemagick'
+       - sourceline: 'ppa:ubuntugis/ppa'
+     packages:
+       - libmagick++-dev
+       - librsvg2-dev
+       - libwebp-dev
+       - libpoppler-cpp-dev
+       - libtesseract-dev
+       - libleptonica-dev
+       - tesseract-ocr-eng
+       - r-cran-rgdal
+       - libfftw3-dev
+       - cargo
+
+bioc_packages:
+  - EBImage
 
 before_install:
   - docker pull scrapinghub/splash:3.2