diff --git a/Dockerfile b/Dockerfile
index eb31ce1..f76334b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1-alpine3.20 AS builder
+FROM golang:1-alpine3.21 AS builder
 
 RUN apk add --no-cache git ca-certificates build-base su-exec olm-dev
 
@@ -6,7 +6,7 @@ COPY . /build
 WORKDIR /build
 RUN go build -o /usr/bin/mautrix-meta
 
-FROM alpine:3.20
+FROM alpine:3.21
 
 ENV UID=1337 \
     GID=1337
diff --git a/Dockerfile.ci b/Dockerfile.ci
index a0356e0..923c31d 100644
--- a/Dockerfile.ci
+++ b/Dockerfile.ci
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.21
 
 ENV UID=1337 \
     GID=1337