diff --git a/roles/caddy/defaults/main.yml b/roles/caddy/defaults/main.yml
index 0592a85..dbc9087 100644
--- a/roles/caddy/defaults/main.yml
+++ b/roles/caddy/defaults/main.yml
@@ -1,5 +1,5 @@
 ---
-caddy_version: alpine
+caddy_version: 2.8.4-alpine # tag exact version to avoid suprising container renewals
 caddy_caddyfile_dir: "{{ docker_stack_files_dir }}/caddy"
 
 caddy_use_debug: no