diff --git a/Dockerfile b/Dockerfile
index 24b5c7d..838a48b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ COPY ./entrypoint.sh /entrypoint.sh
 
 # Add permissions to execute entrypoint
 RUN chmod +x /entrypoint.sh
-# install extra antora generators for documentation search and plantuml rendering
-RUN npm i -g asciidoctor-plantuml asciidoctor-kroki @antora/lunr-extension
+# install extra antora extensions for documentation search and diagram rendering
+RUN npm i -g asciidoctor-kroki @antora/lunr-extension
 
 ENTRYPOINT ["/entrypoint.sh"]
diff --git a/README.md b/README.md
index 1587a8c..96ae742 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ GitHub action that can be used to generate the [Antora](https://antora.org/) sit
 
 Supported Antora version: *>= 3.0.0*
 
-Supported rendering plugins: *asciidoctor-plantuml*, *asciidoctor-kroki*
+Supported rendering plugins: *asciidoctor-kroki*
 
 Supported extensions: *@antora/lunr-extension*
 
diff --git a/action.yml b/action.yml
index fb68e96..62eb2cf 100644
--- a/action.yml
+++ b/action.yml
@@ -1,5 +1,5 @@
 name: "Antora Site"
-description: "Generate the Antora site with PlantUML and Kroki diagram support"
+description: "Generate the Antora site with Kroki diagram support"
 branding:
   icon: book-open
   color: yellow
@@ -30,13 +30,13 @@ runs:
     - name: Set up Docker Compose
       uses: docker/setup-compose-action@364cc21a5de5b1ee4a7f5f9d3fa374ce0ccde746  # v1.2.0
       
-    - name: Generate Antora site with PlantUML and Kroki
+    - name: Generate Antora site with Kroki
       shell: bash
       run: |
         cd ${{ github.action_path }}
         
-        # Start diagram servers (PlantUML, Kroki, Mermaid)
-        docker compose up -d plantuml mermaid kroki
+        # Start diagram servers (Kroki, Mermaid)
+        docker compose up -d mermaid kroki
         
         docker compose run --rm \
           -e INPUT_SITE_SOURCES_PATH="${{ inputs.site_sources_path }}" \
diff --git a/docker-compose.yml b/docker-compose.yml
index d30ff27..71d3350 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,18 +1,4 @@
 services:
-  plantuml:
-    image: docker.io/plantuml/plantuml-server:jetty@sha256:ac656ab4215fd80554c59330fd365a3b29041e317f232563c7fc807680ec4ef0
-    container_name: plantuml-server
-    ports:
-      - "8000:8080"
-    networks:
-      - antora-network
-    healthcheck:
-      test: ["CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:8080/ || exit 1"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-      start_period: 20s
-
   mermaid:
     image: yuzutech/kroki-mermaid:0.28.0@sha256:e301872d57b397e1020768cfbafd3ac5d3f2c47a2615d65b9af217c832a226f4
     container_name: mermaid-server
@@ -43,14 +29,11 @@ services:
       dockerfile: Dockerfile
     container_name: antora-generator
     depends_on:
-      plantuml:
-        condition: service_healthy
       kroki:
         condition: service_healthy
     networks:
       - antora-network
     environment:
-      - PLANTUML_SERVER_URL=http://plantuml:8080
       - KROKI_SERVER_URL=http://kroki:8000
 
 networks:
diff --git a/entrypoint.sh b/entrypoint.sh
index 06b545a..8e51e4d 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -37,6 +37,5 @@ antora \
 --generator $INPUT_ANTORA_GENERATOR \
 --fetch $INPUT_ANTORA_PLAYBOOK \
 --attribute kroki-server-url=$KROKI_SERVER_URL \
---attribute plantuml-server-url=$PLANTUML_SERVER_URL \
 --attribute kroki-fetch-diagram=true \
 --stacktrace $INPUT_ANTORA_ADDITIONAL_ARGUMENTS