diff --git a/mergerfs/Dockerfile b/mergerfs/Dockerfile
index bea58db..c689346 100644
--- a/mergerfs/Dockerfile
+++ b/mergerfs/Dockerfile
@@ -3,7 +3,7 @@
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.5.0 AS xx
 
 # =========================================================
-FROM --platform=$BUILDPLATFORM alpine:3.20.3 AS build
+FROM --platform=$BUILDPLATFORM alpine:3.21.0 AS build
 SHELL ["/bin/ash", "-euxo", "pipefail", "-c"]
 COPY --from=xx / /
 ARG VERSION
diff --git a/snapraid/Dockerfile b/snapraid/Dockerfile
index af5ab85..ead3485 100644
--- a/snapraid/Dockerfile
+++ b/snapraid/Dockerfile
@@ -3,7 +3,7 @@
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.5.0 AS xx
 
 # =========================================================
-FROM --platform=$BUILDPLATFORM alpine:3.20.3 AS build
+FROM --platform=$BUILDPLATFORM alpine:3.21.0 AS build
 SHELL ["/bin/ash", "-euxo", "pipefail", "-c"]
 RUN apk add --no-cache clang make
 COPY --from=xx / /