diff --git a/Dockerfile b/Dockerfile
index 8e2452d..d5cc888 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM rust:alpine@sha256:ff0adc35894eb79586ce752a1b5a9eadc88b938c56d8f2b4b537b6258ff3fa10 AS builder
+FROM rust:alpine@sha256:7f752ee8ea5deb9f4863d8c3f228a216a6466619882f09a44b9eda9617dc7770 AS builder
 
 # renovate: datasource=crate depName=mdbook
 ARG MDBOOK_VERSION=0.5.1