diff --git a/composer.lock b/composer.lock
index 1c26da1..f3368af 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,16 +8,16 @@
     "packages": [
         {
             "name": "league/flysystem",
-            "version": "3.32.0",
+            "version": "3.33.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/thephpleague/flysystem.git",
-                "reference": "254b1595b16b22dbddaaef9ed6ca9fdac4956725"
+                "reference": "570b8871e0ce693764434b29154c54b434905350"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/thephpleague/flysystem/zipball/254b1595b16b22dbddaaef9ed6ca9fdac4956725",
-                "reference": "254b1595b16b22dbddaaef9ed6ca9fdac4956725",
+                "url": "https://api.github.com/repos/thephpleague/flysystem/zipball/570b8871e0ce693764434b29154c54b434905350",
+                "reference": "570b8871e0ce693764434b29154c54b434905350",
                 "shasum": ""
             },
             "require": {
@@ -85,9 +85,9 @@
             ],
             "support": {
                 "issues": "https://github.com/thephpleague/flysystem/issues",
-                "source": "https://github.com/thephpleague/flysystem/tree/3.32.0"
+                "source": "https://github.com/thephpleague/flysystem/tree/3.33.0"
             },
-            "time": "2026-02-25T17:01:41+00:00"
+            "time": "2026-03-25T07:59:30+00:00"
         },
         {
             "name": "league/flysystem-local",
@@ -1457,11 +1457,11 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "2.1.40",
+            "version": "2.1.46",
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/9b2c7aeb83a75d8680ea5e7c9b7fca88052b766b",
-                "reference": "9b2c7aeb83a75d8680ea5e7c9b7fca88052b766b",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/a193923fc2d6325ef4e741cf3af8c3e8f54dbf25",
+                "reference": "a193923fc2d6325ef4e741cf3af8c3e8f54dbf25",
                 "shasum": ""
             },
             "require": {
@@ -1506,7 +1506,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2026-02-23T15:04:35+00:00"
+            "time": "2026-04-01T09:25:14+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -3105,5 +3105,5 @@
         "php": "^8.3"
     },
     "platform-dev": {},
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }
diff --git a/src/MappingEntry.php b/src/MappingEntry.php
index e18f2e7..5ae585f 100644
--- a/src/MappingEntry.php
+++ b/src/MappingEntry.php
@@ -7,10 +7,11 @@
 use function array_count_values;
 use function array_key_first;
 use function arsort;
+use function assert;
 
 class MappingEntry
 {
-    /** @var array<string> */
+    /** @var list<string> */
     private array $names = [];
 
     public function __construct(private string $stableName)
@@ -29,6 +30,7 @@ public function getStableName(): string
 
     public function getMostCommonName(): string
     {
+        assert(! empty($this->names));
         $values = array_count_values($this->names);
         arsort($values);