diff --git a/demo/Dockerfile b/demo/Dockerfile
index 7cb98f4b3..73b7fc981 100644
--- a/demo/Dockerfile
+++ b/demo/Dockerfile
@@ -24,7 +24,7 @@ RUN CGO_ENABLED=0 make -C /src VERSION="${VERSION:-dev}" karma
 
 FROM ghcr.io/prymitive/kthxbye:v0.16 as kthxbye
 
-FROM prom/alertmanager:v0.25.0 as alertmanager
+FROM prom/alertmanager:v0.26.0 as alertmanager
 
 FROM alpine:3.18
 COPY --from=kthxbye /kthxbye /kthxbye