diff --git a/.travis.yml b/.travis.yml
index 4b0e9264..b280e9d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ before_cache:
 
 before_install:
     # Ubuntu packages
+    - sudo add-apt-repository ppa:heyarje/libav-11 -y  # for libav11, which is for unpaper
     - sudo apt-get update -qq  # must go after all add-apt-repo
     - sudo apt-get install -y ghostscript tesseract-ocr tesseract-ocr-deu tesseract-ocr-eng tesseract-ocr-fra qpdf poppler-utils libavformat56 libavcodec56 libavutil54 libffi-dev