diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index b2563785..8f768202 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -102,6 +102,7 @@ jobs:
 
       - name: Install required dependencies
         run: |
+          sudo apt-get update
           sudo apt-get -y install libevent-dev krb5-kdc krb5-admin-server libkrb5-dev
           python3 -m pip install --upgrade pip
           pip install tox