diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 22151ea..6af0ade 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,7 @@ jobs:
         sudo apt-get -qq update
         sudo apt-get install -y --no-install-recommends texlive-fonts-recommended \
           texlive-latex-extra texlive-fonts-extra dvipng texlive-latex-recommended
+        updmap -sys
     - name: Build metamath-narrow.pdf
       run: ./make-narrow
     - name: Build metamath.pdf