diff --git a/.circleci/config.yml b/.circleci/config.yml
index 10317cb..dd4be76 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -8,6 +8,7 @@ jobs:
       - CXX: g++-7.1
     steps:
       - checkout
+      - run: apt-get install -y sudo
       - run: sudo add-apt-repository -y ppa:jonathonf/gcc-7.1
       - run: sudo apt-get update
       - run: sudo apt-get install gcc-7 g++-7