diff --git a/Dockerfile b/Dockerfile
index e0f510d..da29401 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM rust:alpine@sha256:2ea3db105d38fdfa4e31f366674287fcaa828087e2fe3973befdc537f2d443b1 AS builder
+FROM rust:alpine@sha256:f87aa870663e2b57ec8c69de82c7eedf7383bee987eef7612c0359635eaadb41 AS builder
 
 # renovate: datasource=crate depName=mdbook
 ARG MDBOOK_VERSION=0.5.1