diff --git a/.github/workflows/build_main_documentation.yml b/.github/workflows/build_main_documentation.yml
index 11e36ed57f..efd61c1fd4 100644
--- a/.github/workflows/build_main_documentation.yml
+++ b/.github/workflows/build_main_documentation.yml
@@ -57,6 +57,7 @@ jobs:
       - name: Free disk space
         run: |
           df -h
+          sudo apt-get update
           sudo apt-get purge -y '^apache.*'
           sudo apt-get purge -y '^imagemagick.*'
           sudo apt-get purge -y '^dotnet.*'