diff --git a/composer.json b/composer.json
index 3f78197fd..362eaffc8 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,7 @@
       "composer-runtime-api": "^2.0"
    },
    "require-dev": {
-      "phpstan/phpstan": "0.12.57",
+      "phpstan/phpstan": "0.12.58",
       "phpstan/phpstan-phpunit": "^0.12.6",
       "phpstan/phpstan-strict-rules": "^0.12.2",
       "phpunit/phpunit": "^9.2"
diff --git a/composer.lock b/composer.lock
index 97ab399f1..2174506a6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "da01dc4097df12e4b124207d071b81f4",
+    "content-hash": "6e254dbfde069aa358d41f88a9ea7f1e",
     "packages": [
         {
             "name": "adhocore/json-comment",
@@ -996,16 +996,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "0.12.57",
+            "version": "0.12.58",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "f9909d1d0c44b4cbaf72babcf80e8f14d6fdd55b"
+                "reference": "2a4847df6047b30af28854ed9dc95304cdb56ae5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/f9909d1d0c44b4cbaf72babcf80e8f14d6fdd55b",
-                "reference": "f9909d1d0c44b4cbaf72babcf80e8f14d6fdd55b",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/2a4847df6047b30af28854ed9dc95304cdb56ae5",
+                "reference": "2a4847df6047b30af28854ed9dc95304cdb56ae5",
                 "shasum": ""
             },
             "require": {
@@ -1036,7 +1036,7 @@
             "description": "PHPStan - PHP Static Analysis Tool",
             "support": {
                 "issues": "https://github.com/phpstan/phpstan/issues",
-                "source": "https://github.com/phpstan/phpstan/tree/0.12.57"
+                "source": "https://github.com/phpstan/phpstan/tree/0.12.58"
             },
             "funding": [
                 {
@@ -1052,7 +1052,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-11-21T12:53:28+00:00"
+            "time": "2020-11-29T13:32:03+00:00"
         },
         {
             "name": "phpstan/phpstan-phpunit",
diff --git a/src/pocketmine/permission/BanEntry.php b/src/pocketmine/permission/BanEntry.php
index d67399925..44d8c03e1 100644
--- a/src/pocketmine/permission/BanEntry.php
+++ b/src/pocketmine/permission/BanEntry.php
@@ -23,6 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\permission;
 
+use pocketmine\utils\AssumptionFailedError;
 use function array_shift;
 use function count;
 use function explode;
@@ -145,7 +146,9 @@ class BanEntry{
 	private static function parseDate(string $date) : \DateTime{
 		$datetime = \DateTime::createFromFormat(self::$format, $date);
 		if(!($datetime instanceof \DateTime)){
-			throw new \RuntimeException("Error parsing date for BanEntry: " . implode(", ", \DateTime::getLastErrors()["errors"]));
+			$lastErrors = \DateTime::getLastErrors();
+			if($lastErrors === false) throw new AssumptionFailedError("DateTime::getLastErrors() should not be returning false in here");
+			throw new \RuntimeException("Error parsing date for BanEntry: " . implode(", ", $lastErrors["errors"]));
 		}
 
 		return $datetime;