diff --git a/Dockerfile.example b/Dockerfile.example
index 38ee93b..d306ea1 100644
--- a/Dockerfile.example
+++ b/Dockerfile.example
@@ -1,8 +1,8 @@
-FROM alpine@sha256:51b67269f354137895d43f3b3d810bfacd3945438e94dc5ac55fdac340352f48 as certs
+FROM alpine:3.19.0@sha256:51b67269f354137895d43f3b3d810bfacd3945438e94dc5ac55fdac340352f48 as certs
 
 RUN apk add --update --no-cache ca-certificates
 
-FROM alpine@sha256:51b67269f354137895d43f3b3d810bfacd3945438e94dc5ac55fdac340352f48
+FROM alpine:3.19.0@sha256:51b67269f354137895d43f3b3d810bfacd3945438e94dc5ac55fdac340352f48
 
 COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt