diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a0895712..e2c96397 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -57,9 +57,18 @@ jobs:
                     -   php-version: '8.3'
                         symfony-version: '6.4.*'
 
+                    # Test against Symfony 6.4 on PHP8.4
+                    -   php-version: '8.4'
+                        symfony-version: '6.4.*'
+
                     # Test against Symfony 7
                     -   php-version: '8.3'
                         symfony-version: '7.*'
+
+                    # Test against Symfony 7 on PHP8.4
+                    -   php-version: '8.4'
+                        symfony-version: '7.*'
+
         steps:
             -   name: 'Checkout code'
                 uses: actions/checkout@v4
@@ -93,6 +102,14 @@ jobs:
                     # Test against Symfony 7.*
                     -   php-version: '8.3'
                         symfony-version: '7.*'
+
+                    # Minimum PHP version
+                    -   php-version: '8.4'
+                        symfony-version: '6.4.*'
+
+                    # Test against Symfony 7.*
+                    -   php-version: '8.4'
+                        symfony-version: '7.*'
         steps:
             -   name: 'Checkout code'
                 uses: actions/checkout@v4
diff --git a/app/composer.json b/app/composer.json
index 41749b9f..767d310f 100644
--- a/app/composer.json
+++ b/app/composer.json
@@ -2,7 +2,7 @@
     "type": "project",
     "license": "MIT",
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-json": "*",
         "doctrine/doctrine-bundle": "^2.0.3",
         "doctrine/orm": "^2.9 || ^3.0",
diff --git a/composer.json b/composer.json
index 8349f284..1f027278 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-json": "*",
         "lcobucci/clock": "^3.0",
         "lcobucci/jwt": "^5.0",
diff --git a/src/backup-code/composer.json b/src/backup-code/composer.json
index 539ad3b7..31182cf9 100644
--- a/src/backup-code/composer.json
+++ b/src/backup-code/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "scheb/2fa-bundle": "self.version"
     },
     "autoload": {
diff --git a/src/bundle/composer.json b/src/bundle/composer.json
index f4ed9849..c13d0140 100644
--- a/src/bundle/composer.json
+++ b/src/bundle/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-json": "*",
         "symfony/config": "^6.4 || ^7.0",
         "symfony/dependency-injection": "^6.4 || ^7.0",
diff --git a/src/email/composer.json b/src/email/composer.json
index 8cfa5d2b..dd134fe6 100644
--- a/src/email/composer.json
+++ b/src/email/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "scheb/2fa-bundle": "self.version"
     },
     "autoload": {
diff --git a/src/google-authenticator/composer.json b/src/google-authenticator/composer.json
index aaa40813..a84283aa 100644
--- a/src/google-authenticator/composer.json
+++ b/src/google-authenticator/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "scheb/2fa-bundle": "self.version",
         "spomky-labs/otphp": "^11.0"
     },
diff --git a/src/totp/composer.json b/src/totp/composer.json
index 4231ef88..78e1e2ac 100644
--- a/src/totp/composer.json
+++ b/src/totp/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "scheb/2fa-bundle": "self.version",
         "spomky-labs/otphp": "^11.0"
     },
diff --git a/src/trusted-device/composer.json b/src/trusted-device/composer.json
index 8b363963..6625b698 100644
--- a/src/trusted-device/composer.json
+++ b/src/trusted-device/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "scheb/2fa-bundle": "self.version",
         "lcobucci/clock": "^3.0",
         "lcobucci/jwt": "^5.0"