diff --git a/docker/Dockerfile.linux.386 b/docker/Dockerfile.linux.386
index fa491f8..19b83c5 100644
--- a/docker/Dockerfile.linux.386
+++ b/docker/Dockerfile.linux.386
@@ -1,4 +1,4 @@
-FROM i386/alpine:3.19@sha256:15c46ced65c6abed6a27472a7904b04273e9a8091a5627badd6ff016ab073171 AS build
+FROM i386/alpine:3.20@sha256:bdea2fc06762f63b168e481c88a732e73d856b98c9a504f2c749c867ef9d41ac AS build
 RUN apk add --no-cache ca-certificates mailcap
 
 FROM scratch
diff --git a/docker/Dockerfile.linux.amd64 b/docker/Dockerfile.linux.amd64
index 11b0299..cd4f0e9 100644
--- a/docker/Dockerfile.linux.amd64
+++ b/docker/Dockerfile.linux.amd64
@@ -1,4 +1,4 @@
-FROM amd64/alpine:3.19@sha256:6457d53fb065d6f250e1504b9bc42d5b6c65941d57532c072d929dd0628977d0 AS build
+FROM amd64/alpine:3.20@sha256:216266c86fc4dcef5619930bd394245824c2af52fd21ba7c6fa0e618657d4c3b AS build
 RUN apk add --no-cache ca-certificates mailcap
 
 FROM scratch
diff --git a/docker/Dockerfile.linux.arm b/docker/Dockerfile.linux.arm
index 7ddb01f..5fc0d83 100644
--- a/docker/Dockerfile.linux.arm
+++ b/docker/Dockerfile.linux.arm
@@ -1,4 +1,4 @@
-FROM arm32v6/alpine:3.19@sha256:b229a85166aadbde58e73e03c5e2b9737fb4642ffb2d98ba453adc90d144c1d8 AS build
+FROM arm32v6/alpine:3.20@sha256:4a6ffef76277d8c1d912ad489e0c09ddc09fdf7aefae51750a33dc47478c0cc0 AS build
 RUN apk add --no-cache ca-certificates mailcap
 
 FROM scratch
diff --git a/docker/Dockerfile.linux.arm64 b/docker/Dockerfile.linux.arm64
index 53efde8..199f9c7 100644
--- a/docker/Dockerfile.linux.arm64
+++ b/docker/Dockerfile.linux.arm64
@@ -1,4 +1,4 @@
-FROM arm64v8/alpine:3.19@sha256:a0264d60f80df12bc1e6dd98bae6c43debe6667c0ba482711f0d806493467a46 AS build
+FROM arm64v8/alpine:3.20@sha256:1c3b93ed450e26eac89b471d6d140e2f99488f489739b8b8ea5e8202dd086f82 AS build
 RUN apk add --no-cache ca-certificates mailcap
 
 FROM scratch