diff --git a/ansible/idr-omero-readonly.yml b/ansible/idr-omero-readonly.yml
index b92950ce..710226ad 100644
--- a/ansible/idr-omero-readonly.yml
+++ b/ansible/idr-omero-readonly.yml
@@ -208,7 +208,7 @@
     - name: Override lib/server JARs
       become: yes
       get_url:
-        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.3.1/OMEZarrReader-0.3.1.jar"
+        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.4.0/OMEZarrReader-0.4.0.jar"
         dest: "{{ omero_common_basedir }}/server/OMERO.server/lib/server/OMEZarrReader.jar"
         force: yes
       notify: restart omero-server
@@ -216,7 +216,7 @@
     - name: Override lib/client JARs
       become: yes
       get_url:
-        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.3.1/OMEZarrReader-0.3.1.jar"
+        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.4.0/OMEZarrReader-0.4.0.jar"
         dest: "{{ omero_common_basedir }}/server/OMERO.server/lib/client/OMEZarrReader.jar"
         force: yes
       notify: restart omero-server
diff --git a/ansible/idr-omero.yml b/ansible/idr-omero.yml
index a8703866..3827c98e 100644
--- a/ansible/idr-omero.yml
+++ b/ansible/idr-omero.yml
@@ -79,7 +79,7 @@
     - name: Override lib/server JARs
       become: yes
       get_url:
-        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.3.1/OMEZarrReader-0.3.1.jar"
+        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.4.0/OMEZarrReader-0.4.0.jar"
         dest: "{{ omero_common_basedir }}/server/OMERO.server/lib/server/OMEZarrReader.jar"
         force: yes
       notify: restart omero-server
@@ -87,7 +87,7 @@
     - name: Override lib/client JARs
       become: yes
       get_url:
-        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.3.1/OMEZarrReader-0.3.1.jar"
+        url: "{{ artifactory_baseurl }}/ome/OMEZarrReader/0.4.0/OMEZarrReader-0.4.0.jar"
         dest: "{{ omero_common_basedir }}/server/OMERO.server/lib/client/OMEZarrReader.jar"
         force: yes
       notify: restart omero-server