diff --git a/Dockerfile b/Dockerfile
index 5a966a7..74a0a3f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 # Which versions?
-ARG PHP_MINOR_VERSION=8.4
-ARG PHP_VERSION=${PHP_MINOR_VERSION}.19
+ARG PHP_MINOR_VERSION=8.5
+ARG PHP_VERSION=${PHP_MINOR_VERSION}.4
+ARG PDO_SQLSRV_EXT_VERSION=5.13.0
 ARG REDIS_EXT_VERSION=6.3.0
 ARG IMAGICK_EXT_VERSION=3.8.1
 ARG PCOV_EXT_VERSION=1.0.12
@@ -13,6 +14,7 @@ ARG COMPOSER_VERSION=2.9.5
 FROM --platform=linux/amd64 heroku/heroku:24-build AS stage-amd64
 ARG PHP_MINOR_VERSION
 ARG PHP_VERSION
+ARG PDO_SQLSRV_EXT_VERSION
 ARG REDIS_EXT_VERSION
 ARG IMAGICK_EXT_VERSION
 ARG PCOV_EXT_VERSION
@@ -37,6 +39,7 @@ RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-amd64-stable/ext-redis-${REDIS_EXT_VERSION}_php-${PHP_MINOR_VERSION}.tar.gz | tar xz -C /app/.heroku/php
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-amd64-stable/ext-imagick-${IMAGICK_EXT_VERSION}_php-${PHP_MINOR_VERSION}.tar.gz | tar xz -C /app/.heroku/php
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-amd64-stable/ext-pcov-${PCOV_EXT_VERSION}_php-${PHP_MINOR_VERSION}.tar.gz | tar xz -C /app/.heroku/php
+RUN curl --silent --location https://robuust-heroku-php.s3.eu-west-1.amazonaws.com/dist-heroku-24-develop/extensions/no-debug-non-zts-20250925/pdo_sqlsrv-$PDO_SQLSRV_EXT_VERSION-x86.tar.gz | tar xz -C /app/.heroku/php
 
 # Install Composer
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-amd64-stable/composer-${COMPOSER_VERSION}.tar.gz | tar xz -C /app/.heroku/php
@@ -48,6 +51,7 @@ RUN curl --silent --location https://nodejs.org/dist/v${NODE_VERSION}/node-v${NO
 FROM --platform=linux/arm64 heroku/heroku:24-build AS stage-arm64
 ARG PHP_MINOR_VERSION
 ARG PHP_VERSION
+ARG PDO_SQLSRV_EXT_VERSION
 ARG REDIS_EXT_VERSION
 ARG IMAGICK_EXT_VERSION
 ARG PCOV_EXT_VERSION
@@ -72,6 +76,7 @@ RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-arm64-stable/ext-redis-${REDIS_EXT_VERSION}_php-${PHP_MINOR_VERSION}.tar.gz | tar xz -C /app/.heroku/php
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-arm64-stable/ext-imagick-${IMAGICK_EXT_VERSION}_php-${PHP_MINOR_VERSION}.tar.gz | tar xz -C /app/.heroku/php
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-arm64-stable/ext-pcov-${PCOV_EXT_VERSION}_php-${PHP_MINOR_VERSION}.tar.gz | tar xz -C /app/.heroku/php
+RUN curl --silent --location https://robuust-heroku-php.s3.eu-west-1.amazonaws.com/dist-heroku-24-develop/extensions/no-debug-non-zts-20250925/pdo_sqlsrv-$PDO_SQLSRV_EXT_VERSION.tar.gz | tar xz -C /app/.heroku/php
 
 # Install Composer
 RUN curl --silent --location https://heroku-buildpack-php.s3.dualstack.us-east-1.amazonaws.com/dist-heroku-24-arm64-stable/composer-${COMPOSER_VERSION}.tar.gz | tar xz -C /app/.heroku/php
@@ -93,7 +98,13 @@ ENV PORT=3000
 ENV WEB_CONCURRENCY=64
 
 # Locate our binaries
-ENV PATH=/app/.heroku/php/bin:/app/.heroku/php/sbin:/app/.heroku/node/bin/:/app/user/node_modules/.bin:/app/user/vendor/bin:/app/user/:$PATH
+ENV PATH=/app/.heroku/php/bin:/app/.heroku/php/sbin:/app/.heroku/node/bin/:/app/user/node_modules/.bin:/app/user/vendor/bin:/app/user:/opt/mssql-tools18/bin:$PATH
+
+# Install Microsoft ODBC driver, MSSQL tools and unixODBC development headers
+RUN curl --insecure https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor -o /usr/share/keyrings/microsoft-prod.gpg \
+  && curl --insecure https://packages.microsoft.com/config/ubuntu/24.04/prod.list | tee /etc/apt/sources.list.d/mssql-release.list \
+  && apt-get update -qqy \
+  && ACCEPT_EULA=Y apt-get -qqy install msodbcsql18 mssql-tools18 unixodbc-dev
 
 # Apache Config
 RUN curl --silent --location https://raw.githubusercontent.com/heroku/heroku-buildpack-php/master/support/build/_conf/apache2/httpd.conf > /app/.heroku/php/etc/apache2/httpd.conf
@@ -125,6 +136,7 @@ RUN echo "\n\
   extension=intl.so \n\
   extension=mbstring.so \n\
   extension=pcntl.so \n\
+  extension=pdo_sqlsrv.so \n\
   extension=pcov.so \n\
   extension=redis.so \n\
   extension=imagick.so \n\
diff --git a/README.md b/README.md
index dcc95c7..83118c9 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,13 @@
 # Docker image for Heroku PHP
 
-Usage: `FROM ghcr.io/robuust/heroku-php`
+Usage: `FROM ghcr.io/robuust/heroku-php:pdo_sqlsrv`
 
 # Specifications
 
 * Heroku 24
 * Apache
 * Nginx
-* PHP 8.4.x with Redis, Imagick and PCov
+* PHP 8.5.x with Redis, Imagick, PCov and PDO SQL Server
 * Composer 2
 * Node 24.x
 * Yarn 4.x
diff --git a/packages.json b/packages.json
new file mode 100644
index 0000000..d6fdc06
--- /dev/null
+++ b/packages.json
@@ -0,0 +1,42 @@
+{
+  "packages": {
+    "heroku-sys/ext-pdo_sqlsrv": [
+      {
+        "conflict": {},
+        "dist": {
+          "type": "heroku-sys-tar",
+          "url": "https://robuust-heroku-php.s3.eu-west-1.amazonaws.com/dist-heroku-24-develop/extensions/no-debug-non-zts-20250925/pdo_sqlsrv-5.13.0-x86.tar.gz"
+        },
+        "name": "heroku-sys/ext-pdo_sqlsrv",
+        "provide": {},
+        "replace": {},
+        "require": {
+          "heroku-sys/heroku": "^24.0.0",
+          "heroku-sys/php": "8.5.*",
+          "heroku/installer-plugin": "^1.2.0"
+        },
+        "time": "2026-03-09 11:52:30",
+        "type": "heroku-sys-php-extension",
+        "version": "5.13.0"
+      },
+      {
+        "conflict": {},
+        "dist": {
+          "type": "heroku-sys-tar",
+          "url": "https://robuust-heroku-php.s3.eu-west-1.amazonaws.com/dist-heroku-24-develop/extensions/no-debug-non-zts-20240924/pdo_sqlsrv-5.13.0-x86.tar.gz"
+        },
+        "name": "heroku-sys/ext-pdo_sqlsrv",
+        "provide": {},
+        "replace": {},
+        "require": {
+          "heroku-sys/heroku": "^24.0.0",
+          "heroku-sys/php": "8.4.*",
+          "heroku/installer-plugin": "^1.2.0"
+        },
+        "time": "2026-03-09 11:52:30",
+        "type": "heroku-sys-php-extension",
+        "version": "5.13.0"
+      }
+    ]
+  }
+}