diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f2ea65..01c805f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,23 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com), and this project adheres to [Semantic Versioning](https://semver.org).
 
+## [Unreleased]
+### Added
+* *Nothing*
+
+### Changed
+* Update dependencies
+
+### Deprecated
+* *Nothing*
+
+### Removed
+* *Nothing*
+
+### Fixed
+* *Nothing*
+
+
 ## [5.2.1] - 2023-12-17
 ### Added
 * *Nothing*
diff --git a/composer.json b/composer.json
index 2f00d67..496c8b0 100644
--- a/composer.json
+++ b/composer.json
@@ -15,21 +15,21 @@
         "php": "^8.2",
         "ext-json": "*",
         "laminas/laminas-servicemanager": "^3.22",
-        "league/csv": "^9.11",
-        "shlinkio/shlink-config": "^2.4",
+        "league/csv": "^9.14",
+        "shlinkio/shlink-config": "^2.5",
         "shlinkio/shlink-json": "^1.0",
-        "symfony/console": "^6.3"
+        "symfony/console": "^7.0 || ^6.4"
     },
     "require-dev": {
         "guzzlehttp/guzzle": "^7.8",
-        "infection/infection": "^0.27.7",
+        "infection/infection": "^0.27.9",
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
-        "phpunit/phpunit": "^10.4",
+        "phpunit/phpunit": "^10.5",
         "psr/http-factory": "^1.0",
         "roave/security-advisories": "dev-master",
         "shlinkio/php-coding-standard": "~2.3.0",
-        "symfony/var-dumper": "^6.3"
+        "symfony/var-dumper": "^7.0 || ^6.4"
     },
     "suggest": {
         "psr/http-client": "If you want to be able to import URLs from Bit.ly, YOURLS, Kutt.it or another Shlink instance",
diff --git a/src/Command/ImportCommand.php b/src/Command/ImportCommand.php
index a4d8432..9786f56 100644
--- a/src/Command/ImportCommand.php
+++ b/src/Command/ImportCommand.php
@@ -68,7 +68,7 @@ protected function initialize(InputInterface $input, OutputInterface $output): v
         }
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output): ?int
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);
         $source = ImportSource::from($input->getArgument('source'));