diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 6a4835cb..0c53ab30 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -10,6 +10,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-      - run: sudo apt update && sudo apt install -y doxygen mingw-w64
+      - run: sudo apt update && sudo apt install -y doxygen graphviz mingw-w64
       - run: make all -j`nproc` docs
       - run: docker build .