diff --git a/Dockerfile b/Dockerfile
index 4782eea..91f9aff 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.3.0RC5-apache-bookworm
+FROM php:8.3.0RC6-apache-bookworm
 
 # So we can use it anywhere for conditional stuff. Keeping BC with old (non-buildkit, builders)
 ARG TARGETPLATFORM
diff --git a/README.md b/README.md
index e6bc148..29567a1 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ A Moodle PHP environment configured for Moodle development based on [Official PH
 
 | PHP Version  | Variant | Tags             | Status | Notes |
 |--------------|---------|------------------|--------|-------|
-| PHP 8.3      | Bookworm| dev| [![Test and publish 8.3](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml/badge.svg?branch=master)](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml)|8.3.0rc5, testing|
+| PHP 8.3      | Bookworm| dev| [![Test and publish 8.3](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml/badge.svg?branch=master)](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml)|8.3.0rc6, testing|
 | PHP 8.2      | Bookworm | 8.2, 8.2-bookworm| [![Test and publish 8.2](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml/badge.svg?branch=8.2-bookworm)](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml)|
 | PHP 8.1      | Bookworm | 8.1, 8.1-bookworm | [![Test and publish 8.1](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml/badge.svg?branch=8.1-bookworm)](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml)|
 | PHP 8.2      | Bullseye| 8.2-bullseye| [![Test and publish 8.2](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml/badge.svg?branch=8.2-bullseye)](https://github.com/moodlehq/moodle-php-apache/actions/workflows/test_buildx_and_publish.yml)|