diff --git a/Dockerfile b/Dockerfile
index 7c678c7..7f881e5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 #Dockerfile for a Postfix email relay service
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 COPY run.sh /