diff --git a/Dockerfile b/Dockerfile
index e9ad6f4..1b9a780 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG BASEIMAGE=alpine:3.9
+ARG BASEIMAGE=alpine:3.21.0
 FROM ${BASEIMAGE}
 
 ARG BUILD_DATE