diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index 8fa71f9..f31aa10 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20.3@sha256:1e42bbe2508154c9126d48c2b8a75420c3544343bf86fd041fb7527e017a4b4a AS installer
+FROM alpine:3.21.0@sha256:21dc6063fd678b478f57c0e13f47560d0ea4eeba26dfc947b2a4f81f686b9f45 AS installer
 ENV PATH /usr/local/bin/texlive:$PATH
 WORKDIR /install-tl-unx
 RUN apk add --no-cache \
@@ -18,7 +18,7 @@ RUN tlmgr install \
   collection-latexextra \
   latexmk
 
-FROM alpine:3.20.3@sha256:1e42bbe2508154c9126d48c2b8a75420c3544343bf86fd041fb7527e017a4b4a
+FROM alpine:3.21.0@sha256:21dc6063fd678b478f57c0e13f47560d0ea4eeba26dfc947b2a4f81f686b9f45
 ENV PATH /usr/local/bin/texlive:$PATH
 WORKDIR /workdir
 COPY --from=installer /usr/local/texlive /usr/local/texlive