diff --git a/.travis.yml b/.travis.yml
index 30e4fae6..a5d2bd13 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ install:
   - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo apt-get -qq install cmake qt54base qt54x11extras qt54tools libgpg-error-dev zlib1g-dev libxtst-dev; fi
   - if [ "$TRAVIS_OS_NAME" = "linux" ]; then wget http://archive.ubuntu.com/ubuntu/pool/main/libg/libgcrypt20/libgcrypt20_1.6.1-2ubuntu1_amd64.deb; fi
   - if [ "$TRAVIS_OS_NAME" = "linux" ]; then wget http://archive.ubuntu.com/ubuntu/pool/main/libg/libgcrypt20/libgcrypt20-dev_1.6.1-2ubuntu1_amd64.deb; fi
-  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then dpkg -i libgcrypt20_1.6.1-2ubuntu1_amd64.deb libgcrypt20-dev_1.6.1-2ubuntu1_amd64.deb; fi
+  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo dpkg -i libgcrypt20_1.6.1-2ubuntu1_amd64.deb libgcrypt20-dev_1.6.1-2ubuntu1_amd64.deb; fi
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update; fi
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew ls | grep -wq cmake || brew install cmake; fi
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew ls | grep -wq qt5 || brew install qt5; fi