diff --git a/.github/workflows/simulation-1.1.yml b/.github/workflows/simulation-1.1.yml
index 7c999e70d..a31635848 100644
--- a/.github/workflows/simulation-1.1.yml
+++ b/.github/workflows/simulation-1.1.yml
@@ -286,6 +286,7 @@ jobs:
         GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
       run: |
         sudo rm /etc/apt/sources.list.d/*
+        sudo apt-get update
         sudo apt-get install -y avahi-daemon avahi-utils lcov
         script/git-tool clone https://github.com/openthread/ot-commissioner.git /tmp/ot-commissioner --depth 1 --branch main
     - name: Build