diff --git a/tools/ci.sh b/tools/ci.sh
index 86c17bb691..986ec6756e 100755
--- a/tools/ci.sh
+++ b/tools/ci.sh
@@ -33,6 +33,7 @@ function ci_code_formatting_run {
 # code size
 
 function ci_code_size_setup {
+    sudo apt-get update
     sudo apt-get install gcc-multilib
     gcc --version
     ci_gcc_arm_setup