diff --git a/roles/custom/matrix-mailer/defaults/main.yml b/roles/custom/matrix-mailer/defaults/main.yml
index 566b5325..e901c4b0 100644
--- a/roles/custom/matrix-mailer/defaults/main.yml
+++ b/roles/custom/matrix-mailer/defaults/main.yml
@@ -10,7 +10,7 @@ matrix_mailer_container_image_self_build_repository_url: "https://github.com/dev
 matrix_mailer_container_image_self_build_src_files_path: "{{ matrix_mailer_base_path }}/docker-src"
 matrix_mailer_container_image_self_build_version: "{{ matrix_mailer_docker_image.split(':')[1] }}"
 
-# renovate: datasource=docker depName=devture/exim-relay
+# renovate: datasource=docker depName=devture/exim-relay versioning=semver
 matrix_mailer_version: 4.96.2-r0-0
 matrix_mailer_docker_image: "{{ matrix_mailer_docker_image_name_prefix }}devture/exim-relay:{{ matrix_mailer_version }}"
 matrix_mailer_docker_image_name_prefix: "{{ 'localhost/' if matrix_mailer_container_image_self_build else matrix_container_global_registry_prefix }}"