diff --git a/.github/workflows/sphinx_autodoc.yaml b/.github/workflows/sphinx_autodoc.yaml
index 48ab28a..4c85706 100644
--- a/.github/workflows/sphinx_autodoc.yaml
+++ b/.github/workflows/sphinx_autodoc.yaml
@@ -8,7 +8,15 @@ jobs:
         steps:
         -   name: Check out main
             uses: actions/checkout@main
-        -   uses: tlylt/install-graphviz@v1
+        -   name: Install graphviz headers
+            if: ${{ matrix.os == 'ubuntu-latest' }}
+            run: |
+              sudo apt-get update
+              sudo apt-get install -y graphviz graphviz-dev
+        -   name: Install graphviz headers
+            if: ${{ matrix.os == 'macos-latest' }}
+            run: |
+              brew install graphviz
         -   name: Setup Python
             uses: actions/setup-python@v5
         -   name: Install system dependencies
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 6b1cae7..1b1987b 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -30,11 +30,16 @@ jobs:
         steps:
         -   name: Check out
             uses: actions/checkout@main
-        -   uses: tlylt/install-graphviz@v1
-        -   name: Setup Python
             uses: actions/setup-python@v5
-        -   name: Install system dependencies
-            run: sudo apt-get install -y graphviz graphviz-dev
+        -   name: Install graphviz headers
+            if: ${{ matrix.os == 'ubuntu-latest' }}
+            run: |
+              sudo apt-get update
+              sudo apt-get install -y graphviz graphviz-dev
+        -   name: Install graphviz headers
+            if: ${{ matrix.os == 'macos-latest' }}
+            run: |
+              brew install graphviz
         -   name: Install Poetry
             uses: snok/install-poetry@v1
             with: