diff --git a/.ci_support/run_docker_clang.sh b/.ci_support/run_docker_clang.sh
index cf13f4e6e6..55de928ca3 100755
--- a/.ci_support/run_docker_clang.sh
+++ b/.ci_support/run_docker_clang.sh
@@ -2,7 +2,7 @@
 
 set -xe
 git config --global --add safe.directory /io
-sudo pacman -S clang libc++ --noconfirm
+sudo pacman -Sy clang libc++ --noconfirm
 sudo pacman -R python-matplotlib --noconfirm
 
 env