diff --git a/.github/workflows/darwin.yml b/.github/workflows/darwin.yml
index 2151810..fe09d3c 100644
--- a/.github/workflows/darwin.yml
+++ b/.github/workflows/darwin.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Setup
         run: |
           brew update
-          brew install cmake ninja
+          brew install cmake ninja doxygen
       - name: Checkout
         uses: actions/checkout@v4
         with:
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index bc1a603..ead7d8e 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Setup
         run: |
           sudo apt-get update -o Acquire::Retries=10
-          sudo apt-get install -o Acquire::Retries=10 -y cmake ninja-build ${{matrix.config.cc}} ${{matrix.config.cxx}}
+          sudo apt-get install -o Acquire::Retries=10 -y cmake ninja-build doxygen ${{matrix.config.cc}} ${{matrix.config.cxx}}
       - name: Checkout
         uses: actions/checkout@v4
         with:
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 22a897a..78aae33 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -17,7 +17,7 @@ jobs:
     name: "${{matrix.config.vc}}-${{matrix.config.arch}}"
     steps:
       - name: Setup
-        run: choco install cmake ninja
+        run: choco install cmake ninja doxygen.install
       - name: Checkout
         uses: actions/checkout@v4
         with: