diff --git a/Dockerfile b/Dockerfile
index 7739c46..47bb313 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1@sha256:ac85f380a63b13dfcefa89046420e1781752bab202122f8f50032edf31be0021
 
-FROM alpine:3.20@sha256:0a4eaa0eecf5f8c050e5bba433f58c052be7587ee8af3e8b3910ef9ab5fbe9f5
+FROM alpine:3.21@sha256:e323a465c03a31ad04374fc7239144d0fd4e2b92da6e3e0655580476d3a84621
 
 RUN apk add --no-cache ca-certificates nginx