diff --git a/.circleci/config.yml b/.circleci/config.yml
index 52c67f749..a5f38c020 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -100,7 +100,7 @@ jobs:
             echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list
             curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | sudo apt-key add
             sudo apt-get update
-            sudo apt-get install sbt clang-8 openjdk-8-jdk
+            sudo apt-get install -y sbt clang-8 openjdk-8-jdk
             sudo ln -s /usr/lib/llvm-8/bin/clang /usr/bin/clang
             sudo ln -s /usr/lib/llvm-8/bin/clang++ /usr/bin/clang++
       - sbt_cmd: