diff --git a/Dockerfile b/Dockerfile
index 256a2c2..6b8040a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM caddy:2.9.1-builder-alpine@sha256:acb4963e515eb00db086a5639f5a509a56c06ee87573239c7b49fccb56a60f1f AS builder
+FROM caddy:2.9.1-builder-alpine@sha256:3a45422d044ed49dc29bb90981378f2705000cc45a85261f099572caf6187f57 AS builder
 RUN xcaddy build --with github.com/lucaslorentz/caddy-docker-proxy/v2
 FROM caddy:2.9.1-alpine@sha256:b60636634fd2aebaf9460cf60997ad83aad6b139318d5713e2b78a60f52b139c
 COPY --from=builder /usr/bin/caddy /usr/bin/caddy