diff --git a/21/buster-slim/Dockerfile b/21/buster-slim/Dockerfile
deleted file mode 100644
index 0494261ed..000000000
--- a/21/buster-slim/Dockerfile
+++ /dev/null
@@ -1,103 +0,0 @@
-FROM debian:buster-slim
-
-RUN groupadd --gid 1000 node \
-  && useradd --uid 1000 --gid node --shell /bin/bash --create-home node
-
-ENV NODE_VERSION 21.0.0
-
-RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
-    && case "${dpkgArch##*-}" in \
-      amd64) ARCH='x64';; \
-      ppc64el) ARCH='ppc64le';; \
-      s390x) ARCH='s390x';; \
-      arm64) ARCH='arm64';; \
-      armhf) ARCH='armv7l';; \
-      i386) ARCH='x86';; \
-      *) echo "unsupported architecture"; exit 1 ;; \
-    esac \
-    && set -ex \
-    # libatomic1 for arm
-    && apt-get update && apt-get install -y ca-certificates curl wget gnupg dirmngr xz-utils libatomic1 --no-install-recommends \
-    && rm -rf /var/lib/apt/lists/* \
-    # use pre-existing gpg directory, see https://github.com/nodejs/docker-node/pull/1895#issuecomment-1550389150
-    && export GNUPGHOME="$(mktemp -d)" \
-    # gpg keys listed at https://github.com/nodejs/node#release-keys
-    && for key in \
-      4ED778F539E3634C779C87C6D7062848A1AB005C \
-      141F07595B7B3FFE74309A937405533BE57C7D57 \
-      74F12602B6F1C4E913FAA37AD3A89613643B6201 \
-      DD792F5973C6DE52C432CBDAC77ABFA00DDBF2B7 \
-      61FC681DFB92A079F1685E77973F295594EC4689 \
-      8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
-      C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
-      890C08DB8579162FEE0DF9DB8BEAB4DFCF555EF4 \
-      C82FA3AE1CBEDC6BE46B9360C43CEC45C17AB93C \
-      108F52B48DB57BB0CC439B2997B01419BD92F80A \
-      A363A499291CBBC940DD62E41F10027AF002F8B0 \
-    ; do \
-      gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
-      gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
-    done \
-    && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
-    && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
-    && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \
-    && gpgconf --kill all \
-    && rm -rf "$GNUPGHOME" \
-    && grep " node-v$NODE_VERSION-linux-$ARCH.tar.xz\$" SHASUMS256.txt | sha256sum -c - \
-    && tar -xJf "node-v$NODE_VERSION-linux-$ARCH.tar.xz" -C /usr/local --strip-components=1 --no-same-owner \
-    && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
-    && apt-mark auto '.*' > /dev/null \
-    && find /usr/local -type f -executable -exec ldd '{}' ';' \
-      | awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
-      | sort -u \
-      | xargs -r dpkg-query --search \
-      | cut -d: -f1 \
-      | sort -u \
-      | xargs -r apt-mark manual \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && ln -s /usr/local/bin/node /usr/local/bin/nodejs \
-    # smoke tests
-    && node --version \
-    && npm --version
-
-ENV YARN_VERSION 1.22.19
-
-RUN set -ex \
-  && savedAptMark="$(apt-mark showmanual)" \
-  && apt-get update && apt-get install -y ca-certificates curl wget gnupg dirmngr --no-install-recommends \
-  && rm -rf /var/lib/apt/lists/* \
-  # use pre-existing gpg directory, see https://github.com/nodejs/docker-node/pull/1895#issuecomment-1550389150
-  && export GNUPGHOME="$(mktemp -d)" \
-  && for key in \
-    6A010C5166006599AA17F08146C2130DFD2497F5 \
-  ; do \
-    gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
-    gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
-  done \
-  && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz" \
-  && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz.asc" \
-  && gpg --batch --verify yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz \
-  && gpgconf --kill all \
-  && rm -rf "$GNUPGHOME" \
-  && mkdir -p /opt \
-  && tar -xzf yarn-v$YARN_VERSION.tar.gz -C /opt/ \
-  && ln -s /opt/yarn-v$YARN_VERSION/bin/yarn /usr/local/bin/yarn \
-  && ln -s /opt/yarn-v$YARN_VERSION/bin/yarnpkg /usr/local/bin/yarnpkg \
-  && rm yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz \
-  && apt-mark auto '.*' > /dev/null \
-  && { [ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; } \
-  && find /usr/local -type f -executable -exec ldd '{}' ';' \
-    | awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); print so }' \
-    | sort -u \
-    | xargs -r dpkg-query --search \
-    | cut -d: -f1 \
-    | sort -u \
-    | xargs -r apt-mark manual \
-  && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-  # smoke test
-  && yarn --version
-
-COPY docker-entrypoint.sh /usr/local/bin/
-ENTRYPOINT ["docker-entrypoint.sh"]
-
-CMD [ "node" ]
diff --git a/21/buster-slim/docker-entrypoint.sh b/21/buster-slim/docker-entrypoint.sh
deleted file mode 100755
index 1b3116e53..000000000
--- a/21/buster-slim/docker-entrypoint.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-set -e
-
-# Run command with node if the first argument contains a "-" or is not a system command. The last
-# part inside the "{}" is a workaround for the following bug in ash/dash:
-# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=874264
-if [ "${1#-}" != "${1}" ] || [ -z "$(command -v "${1}")" ] || { [ -f "${1}" ] && ! [ -x "${1}" ]; }; then
-  set -- node "$@"
-fi
-
-exec "$@"
diff --git a/21/buster/Dockerfile b/21/buster/Dockerfile
deleted file mode 100644
index bfaae1c2a..000000000
--- a/21/buster/Dockerfile
+++ /dev/null
@@ -1,78 +0,0 @@
-FROM buildpack-deps:buster
-
-RUN groupadd --gid 1000 node \
-  && useradd --uid 1000 --gid node --shell /bin/bash --create-home node
-
-ENV NODE_VERSION 21.0.0
-
-RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
-  && case "${dpkgArch##*-}" in \
-    amd64) ARCH='x64';; \
-    ppc64el) ARCH='ppc64le';; \
-    s390x) ARCH='s390x';; \
-    arm64) ARCH='arm64';; \
-    armhf) ARCH='armv7l';; \
-    i386) ARCH='x86';; \
-    *) echo "unsupported architecture"; exit 1 ;; \
-  esac \
-  # use pre-existing gpg directory, see https://github.com/nodejs/docker-node/pull/1895#issuecomment-1550389150
-  && export GNUPGHOME="$(mktemp -d)" \
-  # gpg keys listed at https://github.com/nodejs/node#release-keys
-  && set -ex \
-  && for key in \
-    4ED778F539E3634C779C87C6D7062848A1AB005C \
-    141F07595B7B3FFE74309A937405533BE57C7D57 \
-    74F12602B6F1C4E913FAA37AD3A89613643B6201 \
-    DD792F5973C6DE52C432CBDAC77ABFA00DDBF2B7 \
-    61FC681DFB92A079F1685E77973F295594EC4689 \
-    8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
-    C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
-    890C08DB8579162FEE0DF9DB8BEAB4DFCF555EF4 \
-    C82FA3AE1CBEDC6BE46B9360C43CEC45C17AB93C \
-    108F52B48DB57BB0CC439B2997B01419BD92F80A \
-    A363A499291CBBC940DD62E41F10027AF002F8B0 \
-  ; do \
-      gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
-      gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
-  done \
-  && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
-  && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
-  && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \
-  && gpgconf --kill all \
-  && rm -rf "$GNUPGHOME" \
-  && grep " node-v$NODE_VERSION-linux-$ARCH.tar.xz\$" SHASUMS256.txt | sha256sum -c - \
-  && tar -xJf "node-v$NODE_VERSION-linux-$ARCH.tar.xz" -C /usr/local --strip-components=1 --no-same-owner \
-  && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
-  && ln -s /usr/local/bin/node /usr/local/bin/nodejs \
-  # smoke tests
-  && node --version \
-  && npm --version
-
-ENV YARN_VERSION 1.22.19
-
-RUN set -ex \
-  # use pre-existing gpg directory, see https://github.com/nodejs/docker-node/pull/1895#issuecomment-1550389150
-  && export GNUPGHOME="$(mktemp -d)" \
-  && for key in \
-    6A010C5166006599AA17F08146C2130DFD2497F5 \
-  ; do \
-    gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$key" || \
-    gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key" ; \
-  done \
-  && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz" \
-  && curl -fsSLO --compressed "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz.asc" \
-  && gpg --batch --verify yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz \
-  && gpgconf --kill all \
-  && rm -rf "$GNUPGHOME" \
-  && mkdir -p /opt \
-  && tar -xzf yarn-v$YARN_VERSION.tar.gz -C /opt/ \
-  && ln -s /opt/yarn-v$YARN_VERSION/bin/yarn /usr/local/bin/yarn \
-  && ln -s /opt/yarn-v$YARN_VERSION/bin/yarnpkg /usr/local/bin/yarnpkg \
-  && rm yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz \
-  # smoke test
-  && yarn --version
-
-COPY docker-entrypoint.sh /usr/local/bin/
-ENTRYPOINT ["docker-entrypoint.sh"]
-
-CMD [ "node" ]
diff --git a/21/buster/docker-entrypoint.sh b/21/buster/docker-entrypoint.sh
deleted file mode 100755
index 1b3116e53..000000000
--- a/21/buster/docker-entrypoint.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-set -e
-
-# Run command with node if the first argument contains a "-" or is not a system command. The last
-# part inside the "{}" is a workaround for the following bug in ash/dash:
-# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=874264
-if [ "${1#-}" != "${1}" ] || [ -z "$(command -v "${1}")" ] || { [ -f "${1}" ] && ! [ -x "${1}" ]; }; then
-  set -- node "$@"
-fi
-
-exec "$@"
diff --git a/versions.json b/versions.json
index 57413da78..9e1f78452 100644
--- a/versions.json
+++ b/versions.json
@@ -51,16 +51,6 @@
         "arm64v8",
         "ppc64le",
         "s390x"
-      ],
-      "buster": [
-        "amd64",
-        "arm32v7",
-        "arm64v8"
-      ],
-      "buster-slim": [
-        "amd64",
-        "arm32v7",
-        "arm64v8"
       ]
     }
   },