diff --git a/Dockerfile b/Dockerfile
index bb5d86f60..c55dfba74 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -37,14 +37,13 @@ RUN --mount=type=cache,target=/root/.cache/uv \
   uv sync --locked --no-dev
 
 # ---- mails ----
-FROM node:22 AS mail-builder
+FROM node:22-alpine AS mail-builder
 
 COPY ./src/mail /mail/app
 
 WORKDIR /mail/app
 
-RUN yarn install --frozen-lockfile && \
-  yarn build
+RUN npm ci --ignore-scripts && npm run build
 
 
 # ---- static link collector ----
diff --git a/compose.yml b/compose.yml
index eb7c3bf18..41ff84a0b 100644
--- a/compose.yml
+++ b/compose.yml
@@ -172,7 +172,7 @@ services:
     working_dir: /app
 
   node:
-    image: node:22
+    image: node:22-alpine
     user: "${DOCKER_USER:-1000}"
     environment:
       HOME: /tmp
diff --git a/src/mail/bin/html-to-plain-text b/src/mail/bin/html-to-plain-text
index ced0c13d5..9c9153be8 100755
--- a/src/mail/bin/html-to-plain-text
+++ b/src/mail/bin/html-to-plain-text
@@ -1,5 +1,5 @@
-#!/usr/bin/env bash
-set -eo pipefail
+#!/bin/sh
+set -e
 # Run html-to-text to convert all html files to text files
 DIR_MAILS="../backend/core/templates/mail/"
 
diff --git a/src/mail/bin/mjml-to-html b/src/mail/bin/mjml-to-html
index 03f5b8c65..38e4eb561 100755
--- a/src/mail/bin/mjml-to-html
+++ b/src/mail/bin/mjml-to-html
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 # Run mjml command to convert all mjml templates to html files
 DIR_MAILS="../backend/core/templates/mail/html/"
diff --git a/src/mail/package.json b/src/mail/package.json
index 7aea3ec03..5ff781a3f 100644
--- a/src/mail/package.json
+++ b/src/mail/package.json
@@ -9,8 +9,8 @@
   },
   "private": true,
   "scripts": {
-    "build-mjml-to-html": "bash ./bin/mjml-to-html",
-    "build-html-to-plain-text": "bash ./bin/html-to-plain-text",
+    "build-mjml-to-html": "sh ./bin/mjml-to-html",
+    "build-html-to-plain-text": "sh ./bin/html-to-plain-text",
     "build": "npm run build-mjml-to-html && npm run build-html-to-plain-text"
   },
   "volta": {