diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 7580fe1..da5b919 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -77,6 +77,7 @@ jobs:
          - name: Install dependencies for a in-tree build
            run: |
               sudo gem install asciidoctor
+              sudo apt-get update -qq
               sudo apt-get install -yqq cmake libglib2.0-dev qttools5-dev qttools5-dev-tools libqt5svg5-dev qtmultimedia5-dev qt5-default libpcap-dev bison flex make python3 python3-pip perl libgcrypt-dev
 
          - name: Build in-tree