diff --git a/.travis.yml b/.travis.yml
index 7711c32d..90e56dca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,6 @@ sudo: false
 language: php
 
 php:
-  - 7.2
   - 7.3
   - 7.4
   - nightly
diff --git a/composer.json b/composer.json
index b8cb7d77..f30ef530 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "sort-packages": true
     },
     "require": {
-        "php": ">=7.2",
+        "php": ">=7.3",
         "respect/stringifier": "^0.2.0",
         "symfony/polyfill-mbstring": "^1.2"
     },
@@ -26,7 +26,7 @@
         "phpstan/phpstan": "^0.12",
         "phpstan/phpstan-deprecation-rules": "^0.12",
         "phpstan/phpstan-phpunit": "^0.12",
-        "phpunit/phpunit": "^7.5",
+        "phpunit/phpunit": "^9.3",
         "respect/coding-standard": "^2.1",
         "squizlabs/php_codesniffer": "^3.5",
         "symfony/validator": "^3.0||^4.0",
diff --git a/docs/installation.md b/docs/installation.md
index 0c2eee8f..6dc607cc 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -7,4 +7,4 @@ you can install it using [Composer](http://getcomposer.org).
 composer require respect/validation
 ```
 
-Works on PHP 7.2 or above.
+Works on PHP 7.3 or above.