diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 3ff41dc..e6cc06d 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -47,9 +47,9 @@ jobs:
           - "Dockerfile.debian-11"
           - "Dockerfile.debian-12"
           - "Dockerfile.ubuntu-2204"
-          - "Dockerfile.ubuntu-2304"
+          - "Dockerfile.ubuntu-2404"
           - "alternative/Dockerfile.debian-13"
-          - "alternative/Dockerfile.ubuntu-2310"
+          - "alternative/Dockerfile.ubuntu-2404"
     steps:
       - uses: actions/checkout@v4
       - uses: docker/setup-buildx-action@v2
diff --git a/Dockerfile.ubuntu-2304 b/Dockerfile.ubuntu-2404
similarity index 91%
rename from Dockerfile.ubuntu-2304
rename to Dockerfile.ubuntu-2404
index 7111e53..875ad56 100644
--- a/Dockerfile.ubuntu-2304
+++ b/Dockerfile.ubuntu-2404
@@ -1,4 +1,4 @@
-FROM ubuntu:lunar-20230816
+FROM ubuntu:noble-20240407.1
 ENV DEBIAN_FRONTEND=noninteractive
 RUN \
   --mount=type=cache,target=/var/cache/apt,sharing=locked \
diff --git a/README.md b/README.md
index 28377fb..23a043e 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Examples:
 - [`Dockerfile.debian-11`](./Dockerfile.debian-11)
 - [`Dockerfile.debian-12`](./Dockerfile.debian-12)
 - [`Dockerfile.ubuntu-2204`](./Dockerfile.ubuntu-2204)
-- [`Dockerfile.ubuntu-2304`](./Dockerfile.ubuntu-2304)
+- [`Dockerfile.ubuntu-2404`](./Dockerfile.ubuntu-2404)
 - [`Dockerfile.archlinux`](./Dockerfile.archlinux)
 
 ## Hints
@@ -42,12 +42,13 @@ Examples:
 
 Distribution-specific default values:
 
-| Distribution   | `SOURCE_DATE_EPOCH`                                   | `SNAPSHOT_ARCHIVE_BASE`                          |
-|----------------|-------------------------------------------------------|--------------------------------------------------|
-| Debian (<= 11) | Timestamp of `/etc/apt/sources.list`                  | `http://snapshot-cloudflare.debian.org/archive/` |
-| Debian (>= 12) | Timestamp of `/etc/apt/sources.list.d/debian.sources` | `http://snapshot-cloudflare.debian.org/archive/` |
-| Ubuntu         | Timestamp of `/etc/apt/sources.list`                  | `http://snapshot.ubuntu.com/`                    |
-| ArchLinux      | Timestamp of `/var/log/pacman.log`                    | `http://archive.archlinux.org/`                  |
+| Distribution      | `SOURCE_DATE_EPOCH`                                   | `SNAPSHOT_ARCHIVE_BASE`                          |
+|-------------------|-------------------------------------------------------|--------------------------------------------------|
+| Debian (<= 11)    | Timestamp of `/etc/apt/sources.list`                  | `http://snapshot-cloudflare.debian.org/archive/` |
+| Debian (>= 12)    | Timestamp of `/etc/apt/sources.list.d/debian.sources` | `http://snapshot-cloudflare.debian.org/archive/` |
+| Ubuntu (<= 23.10) | Timestamp of `/etc/apt/sources.list`                  | `http://snapshot.ubuntu.com/`                    |
+| Ubuntu (>= 24.04) | Timestamp of `/etc/apt/sources.list.d/ubuntu.sources` | `http://snapshot.ubuntu.com/`                    |
+| ArchLinux         | Timestamp of `/var/log/pacman.log`                    | `http://archive.archlinux.org/`                  |
 
 
 ## Related project
diff --git a/alternative/Dockerfile.debian-13 b/alternative/Dockerfile.debian-13
index 22bd3ca..0cc398f 100644
--- a/alternative/Dockerfile.debian-13
+++ b/alternative/Dockerfile.debian-13
@@ -7,7 +7,7 @@ RUN \
   : "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list.d/debian.sources)}" && \
   snapshot="$(/bin/bash -euc "printf \"%(%Y%m%dT%H%M%SZ)T\n\" \"${SOURCE_DATE_EPOCH}\"")" && \
   : "Enabling snapshot" && \
-  sed -i -e '/URIs: http:\/\/deb.debian.org\/debian/ a\Snapshot: true' /etc/apt/sources.list.d/debian.sources && \
+  sed -i -e '/Types: deb/ a\Snapshot: true' /etc/apt/sources.list.d/debian.sources && \
   : "Enabling cache" && \
   rm -f /etc/apt/apt.conf.d/docker-clean && \
   echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' >/etc/apt/apt.conf.d/keep-cache && \
diff --git a/alternative/Dockerfile.ubuntu-2310 b/alternative/Dockerfile.ubuntu-2404
similarity index 86%
rename from alternative/Dockerfile.ubuntu-2310
rename to alternative/Dockerfile.ubuntu-2404
index 6375dbe..7131cc1 100644
--- a/alternative/Dockerfile.ubuntu-2310
+++ b/alternative/Dockerfile.ubuntu-2404
@@ -1,13 +1,13 @@
 # Base image must be Ubuntu 23.10 (Mantic Minotaur) or later: https://salsa.debian.org/apt-team/apt/-/merge_requests/291
-FROM ubuntu:mantic-20230819
+FROM ubuntu:noble-20240407.1
 ENV DEBIAN_FRONTEND=noninteractive
 RUN \
   --mount=type=cache,target=/var/cache/apt,sharing=locked \
   --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  : "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list)}" && \
+  : "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list.d/ubuntu.sources)}" && \
   snapshot="$(/bin/bash -euc "printf \"%(%Y%m%dT%H%M%SZ)T\n\" \"${SOURCE_DATE_EPOCH}\"")" && \
   : "Enabling snapshot" && \
-  sed -i -e 's/^deb http/deb [snapshot=true] http/g' /etc/apt/sources.list && \
+  sed -i -e '/Types: deb/ a\Snapshot: true' /etc/apt/sources.list.d/ubuntu.sources && \
   : "Enabling cache" && \
   rm -f /etc/apt/apt.conf.d/docker-clean && \
   echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' >/etc/apt/apt.conf.d/keep-cache && \
diff --git a/repro-sources-list.sh b/repro-sources-list.sh
index 29252b0..3256c36 100755
--- a/repro-sources-list.sh
+++ b/repro-sources-list.sh
@@ -24,7 +24,7 @@
 # - debian:11    (/etc/apt/sources.list)
 # - debian:12    (/etc/apt/sources.list.d/debian.sources)
 # - ubuntu:22.04 (/etc/apt/sources.list)
-# - ubuntu:23.10 (/etc/apt/sources.list)
+# - ubuntu:24.04 (/etc/apt/sources.listd/ubuntu.sources)
 # - archlinux    (/etc/pacman.d/mirrorlist)
 #
 # For the further information, see https://github.com/reproducible-containers/repro-sources-list.sh
@@ -46,15 +46,12 @@ case "${ID}" in
 	# : "${SNAPSHOT_ARCHIVE_BASE:=http://snapshot.debian.org/archive/}"
 	: "${SNAPSHOT_ARCHIVE_BASE:=http://snapshot-cloudflare.debian.org/archive/}"
 	: "${BACKPORTS:=}"
-	case "${VERSION_ID}" in
-	"10" | "11")
-		: "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list)}"
-		;;
-	*)
+	if [ -e /etc/apt/sources.list.d/debian.sources ]; then
 		: "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list.d/debian.sources)}"
 		rm -f /etc/apt/sources.list.d/debian.sources
-		;;
-	esac
+	else
+		: "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list)}"
+	fi
 	snapshot="$(printf "%(%Y%m%dT%H%M%SZ)T\n" "${SOURCE_DATE_EPOCH}")"
 	# TODO: use the new format for Debian >= 12
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}debian/${snapshot} ${VERSION_CODENAME} main" >/etc/apt/sources.list
@@ -65,8 +62,14 @@ case "${ID}" in
 	;;
 "ubuntu")
 	: "${SNAPSHOT_ARCHIVE_BASE:=http://snapshot.ubuntu.com/}"
-	: "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list)}"
+	if [ -e /etc/apt/sources.list.d/ubuntu.sources ]; then
+		: "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list.d/ubuntu.sources)}"
+		rm -f /etc/apt/sources.list.d/ubuntu.sources
+	else
+		: "${SOURCE_DATE_EPOCH:=$(stat --format=%Y /etc/apt/sources.list)}"
+	fi
 	snapshot="$(printf "%(%Y%m%dT%H%M%SZ)T\n" "${SOURCE_DATE_EPOCH}")"
+	# TODO: use the new format for Ubuntu >= 24.04
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}ubuntu/${snapshot} ${VERSION_CODENAME} main restricted" >/etc/apt/sources.list
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}ubuntu/${snapshot} ${VERSION_CODENAME}-updates main restricted" >>/etc/apt/sources.list
 	echo "deb [check-valid-until=no] ${SNAPSHOT_ARCHIVE_BASE}ubuntu/${snapshot} ${VERSION_CODENAME} universe" >>/etc/apt/sources.list