diff --git a/Dockerfile b/Dockerfile
index 634646da..0d54e01c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.4@sha256:9ba7531bd80fb0a858632727cf7a112fbfd19b17e94c4e84ced81e24ef1a0dbc
+# syntax=docker/dockerfile:1.9@sha256:fe40cf4e92cd0c467be2cfc30657a680ae2398318afd50b0c80585784c604f28
 
 # The archlinux/archlinux repo is updated daily:
 FROM archlinux/archlinux:base-devel@sha256:0c94c38defbd42b9f3e99732ef1d694d01747416674a1c2356a2dc0604ed882b AS base