diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index efe15fd9d..adb677db7 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -105,7 +105,9 @@ jobs:
           pip install -r requirements.txt
           
       - name: Install LaTeX and other system dependencies
-        run: sudo apt install -y texlive-latex-recommended texlive-fonts-recommended texlive-latex-extra latexmk texlive-lang-greek texlive-luatex texlive-xetex texlive-fonts-extra dvipng graphviz
+        run: |
+          sudo apt update
+          sudo apt install -y texlive-latex-recommended texlive-fonts-recommended texlive-latex-extra latexmk texlive-lang-greek texlive-luatex texlive-xetex texlive-fonts-extra dvipng graphviz
           
       - name: Check the docs
         run: |