diff --git a/cmd/prom-aggregation-gateway/Dockerfile b/cmd/prom-aggregation-gateway/Dockerfile
index e8bba13..ac3b5e3 100644
--- a/cmd/prom-aggregation-gateway/Dockerfile
+++ b/cmd/prom-aggregation-gateway/Dockerfile
@@ -1,3 +1,3 @@
-FROM alpine:3.10
+FROM alpine:3.15.4
 COPY prom-aggregation-gateway /
 ENTRYPOINT ["/prom-aggregation-gateway"]