diff --git a/.env.example b/.env.example
index 932f9ee..7a0e1f5 100644
--- a/.env.example
+++ b/.env.example
@@ -214,7 +214,8 @@ COLLABORA_HOME_MODE=
 ### Virusscanner Settings ###
 # IMPORTANT: If you enable antivirus, you also MUST configure the START_ADDITIONAL_SERVICES
 # envvar in the OpenCloud Settings above by adding 'antivirus' to the list.
-# The maximum scan size the virus scanner can handle, needs adjustment in the scanner config as well.
+# The maximum scan size the virus scanner can handle, needs adjustment in the scanner config as well:
+# For ClamAV, set CLAMD_CONF_StreamMaxLength in antivirus/clamav.yml to the same or a higher value.
 # Usable common abbreviations: [KB, KiB, MB, MiB, GB, GiB, TB, TiB, PB, PiB, EB, EiB], example: 2GB.
 # Defaults to "100MB"
 #ANTIVIRUS_MAX_SCAN_SIZE=
diff --git a/README.md b/README.md
index a06cf6e..eb8e1c4 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ OpenCloud Compose offers a modular approach to deploying OpenCloud with several
 - **Full text search** with Apache Tika for content extraction and metadata analysis
 - **Monitoring** with metrics endpoints for observability and performance monitoring
 - **Radicale** integration for Calendar and Contacts
+- **ClamAV** antivirus scanning with ClamAV
 
 ## Quick Start Guide
 
@@ -223,6 +224,25 @@ This exposes the necessary ports:
 If you're using **Nginx Proxy Manager (NPM)**, you **should NOT** activate **"Block Common Exploits"** for the Proxy Host.
 Otherwise, the desktop app authentication will return **error 403 Forbidden**.
 
+### ClamAV anti-virus
+
+Enable anti-virus scans for uploaded files.
+
+Using `-f` flags:
+```bash
+docker compose -f docker-compose.yml -f antivirus/clamav.yml -f traefik/opencloud.yml up -d
+```
+
+Or by setting in `.env`:
+```
+COMPOSE_FILE=docker-compose.yml:antivirus/clamav.yml:traefik/opencloud.yml
+```
+
+**Important:** adjust the variable in `.env` to start the antivirus service. Add additional services separated by comma, e.g. `notifications,antivirus`:
+```
+START_ADDITIONAL_SERVICES="antivirus"
+```
+
 
 ## SSL Certificate Support
 
diff --git a/antivirus/clamav.yml b/antivirus/clamav.yml
new file mode 100644
index 0000000..3878fec
--- /dev/null
+++ b/antivirus/clamav.yml
@@ -0,0 +1,31 @@
+---
+services:
+  opencloud:
+    environment:
+      POSTPROCESSING_STEPS: "virusscan"
+      STORAGE_USERS_DATA_GATEWAY_URL: "http://opencloud:9200/data"
+      ANTIVIRUS_MAX_SCAN_SIZE: ${ANTIVIRUS_MAX_SCAN_SIZE:-100MB}
+      ANTIVIRUS_INFECTED_FILE_HANDLING: abort
+      ANTIVIRUS_MAX_SCAN_SIZE_MODE: ${ANTIVIRUS_MAX_SCAN_SIZE_MODE:-partial}
+      ANTIVIRUS_WORKERS: 1
+      ANTIVIRUS_CLAMAV_SOCKET: /var/run/clamav/clamd.sock
+      ANTIVIRUS_SCANNER_TYPE: clamav
+    volumes:
+      - clamav-socket:/var/run/clamav
+  clamav:
+    image: clamav/clamav:${CLAMAV_DOCKER_TAG:-latest}
+    environment:
+      # Accepts a number with optional K, M or G suffix. Must be greater or equal to ANTIVIRUS_MAX_SCAN_SIZE above.
+      # K = KiB (1024), M = MiB (1024 * 1024), G = GiB (1024 * 1024 * 1024)
+      CLAMD_CONF_StreamMaxLength: 100M
+    networks:
+      opencloud-net:
+    volumes:
+      - clamav-socket:/tmp
+      - clamav-db:/var/lib/clamav
+    logging:
+      driver: ${LOG_DRIVER:-local}
+    restart: always
+volumes:
+  clamav-db:
+  clamav-socket: