diff --git a/Dockerfile b/Dockerfile
index 0ff0eca..b09e631 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,7 +36,7 @@ RUN docker-php-ext-install intl
 
 # Add the Omeka-S PHP code
 # Latest Omeka version, check: https://omeka.org/s/download/
-RUN wget --no-verbose "https://github.com/omeka/omeka-s/releases/download/v4.0.3/omeka-s-4.0.3.zip" -O /var/www/latest_omeka_s.zip
+RUN wget --no-verbose "https://github.com/omeka/omeka-s/releases/download/v4.0.4/omeka-s-4.0.4.zip" -O /var/www/latest_omeka_s.zip
 RUN unzip -q /var/www/latest_omeka_s.zip -d /var/www/ \
 &&  rm /var/www/latest_omeka_s.zip \
 &&  rm -rf /var/www/html/ \
diff --git a/README.md b/README.md
index 34e9fc6..6ddb3be 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ In order to update, you normally just need to change the tag of the relevant ima
 
 Recent versions are available directly from Docker Hub  https://hub.docker.com/r/giocomai/omeka-s-docker
 
-Check out the relevant tags. At this stage, both Omeka S 3.2.3 and Omeka S 4.0.3 are kept reasonably updated. 
+Check out the relevant tags. At this stage, both Omeka S 3.2.3 and Omeka S 4.0.4 are kept reasonably updated. 
 
 ## docker-compose examples