diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 7731dda..de606d5 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -12,7 +12,7 @@ jobs:
       image: alpine:latest
       options: --user root
     steps:
-      - run: apk add --no-cache tectonic nodejs
+      - run: apk add --no-cache tectonic nodejs biber
       - name: Checkout code
         uses: actions/checkout@v4
       - run: tectonic Main.tex