diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4b39c07bd..daaf75fad 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,6 +33,9 @@ jobs:
         with:
           java-version: ${{matrix.java}}
 
+      - name: Install graphviz
+        run: sudo apt install graphviz
+        
       - name: build with maven
         run: mvn -B formatter:validate verify --file pom.xml
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6a25d8c39..e15e44e6a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -30,6 +30,9 @@ jobs:
         with:
           java-version: 8
 
+      - name: Install graphviz
+        run: sudo apt install graphviz
+
       - name: maven release ${{steps.metadata.outputs.current-version}}
         run: |
           java -version