diff --git a/example/compose.yml b/example/compose.yml
index fe46cc7..6ce70f9 100644
--- a/example/compose.yml
+++ b/example/compose.yml
@@ -1,6 +1,6 @@
 services:
   example:
-    image: caddy:2.6.2-alpine
+    image: caddy:2.6.2-alpine@sha256:25a0097607868fb05a89a5ab9fea2f2ea4cecdc89d887d7dcee8c778a21b9e1f
     restart: unless-stopped
     networks:
       - caddy