diff --git a/docker-compose.yml b/docker-compose.yml
index da6b4dc..d86c19e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -231,7 +231,7 @@ services:
     container_name: renovate-valkey
     healthcheck:
       test: redis-cli ping || exit 1
-    image: docker.io/valkey/valkey:8-alpine
+    image: docker.io/valkey/valkey:8-alpine@sha256:d827e7f7552cdee40cc7482dbae9da020f42bc47669af6f71182a4ef76a22773
     environment:
       ALLOW_EMPTY_PASSWORD: yes
       VALKEY_DATA_DIR: /data/valkey