diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 7589df8..5f6f151 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,26 +14,16 @@ jobs:
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
       with:
-        php-version: 8.3
+        php-version: 8.4
         tools: composer:v2
 
     - name: Checkout
-      uses: actions/checkout@v2
-
-    - name: Get Composer Cache Directory
-      id: composer-cache
-      run: |
-        echo "::set-output name=dir::$(composer config cache-files-dir)"
-
-    - uses: actions/cache@v2
+      uses: actions/checkout@v4
       with:
-        path: ${{ steps.composer-cache.outputs.dir }}
-        key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-composer
+        show-progress: false
 
-    - name: Install composer dependencies
-      run: composer install --no-interaction --no-progress
+    - name: Composer install
+      uses: ingenerator/github-composite-actions/cached-composer-install@v1
 
     - name: Run unit tests
       run: |
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 92b9e50..886809c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 
 ### Unreleased
 
+### v1.2.0 (2025-07-23)
+
+* Require PHP 8.4
+
 ### v1.1.0 (2024-10-02)
 
 * Support PHP 8.3
diff --git a/composer.json b/composer.json
index bed4dce..eeb8376 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/ingenerator/microframework",
   "type": "library",
   "require": {
-    "php": "~8.3.0",
+    "php": "~8.4.0",
     "ingenerator/php-utils": "^2.0",
     "guzzlehttp/psr7": "^2.7"
   },
diff --git a/test/blackbox/README.md b/test/blackbox/README.md
index 11edad4..6ade738 100644
--- a/test/blackbox/README.md
+++ b/test/blackbox/README.md
@@ -12,7 +12,7 @@ The tests are run against the **built version of the package**. To do this, we:
   matching the download archive that github will produce for that commit - including that it respects `export-ignore`
   and similar instructions in the .gitattributes.
 * Use composer to install that packaged tar, together with its dependencies, into a docker filesystem
-* Then copies the entire built project into a php:8.3-apache image which runs as the test_subject.
+* Then copies the entire built project into a php:8.4-apache image which runs as the test_subject.
 
 Note that this means when working locally, changes to the application code **will not be picked up by the test_subject
 automatically**. To update the test_subject you will need to **commit your changes** (so that they are included in the
diff --git a/test/blackbox/docker-compose.yaml b/test/blackbox/docker-compose.yaml
index 8a24d89..c111555 100644
--- a/test/blackbox/docker-compose.yaml
+++ b/test/blackbox/docker-compose.yaml
@@ -3,7 +3,7 @@ services:
   # The test_runner is the outside of the black box, it has a mounted copy of the full
   # codebase for running tests etc.
   test_runner:
-    image: php:8.3-apache
+    image: php:8.4-apache
     environment:
     - TEST_SUBJECT_BASE_URI=http://test_subject
     working_dir: /workspace
@@ -30,7 +30,7 @@ services:
         
         # Then build the packaged library into an HTTP server with our expected config and environment
         # Note that we need to include composer to ensure that it will 
-        FROM php:8.3-apache
+        FROM php:8.4-apache
         WORKDIR /var/www      
         COPY --from=composer-builder /workspace/test/blackbox/implementation /var/www
         COPY --from=composer:2 /usr/bin/composer /usr/bin/composer