diff --git a/.circleci/config.yml b/.circleci/config.yml
index ba2fd5d..00276e2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -65,6 +65,7 @@ commands:
     description: run Xephyr on DISPLAY=:10
     steps:
       - run: |
+          sudo apt update
           sudo apt install xserver-xephyr
           Xephyr -ac -br -noreset -screen 1280x1024x24 :10 &
           sleep 2