diff --git a/composer.json b/composer.json
index ab12807dace..3553f56f8e0 100644
--- a/composer.json
+++ b/composer.json
@@ -43,7 +43,7 @@
         "doctrine/coding-standard": "12.0.0",
         "fig/log-test": "^1",
         "jetbrains/phpstorm-stubs": "2023.1",
-        "phpstan/phpstan": "1.11.1",
+        "phpstan/phpstan": "1.11.5",
         "phpstan/phpstan-strict-rules": "^1.6",
         "phpunit/phpunit": "9.6.19",
         "psalm/plugin-phpunit": "0.18.4",
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 9c3b2389430..e7a2aad5461 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -146,5 +146,11 @@ parameters:
         # Ignore the possible false return value of db2_num_rows().
         - '~^Method Doctrine\\DBAL\\Driver\\IBMDB2\\Connection\:\:exec\(\) should return int but returns int<0, max>\|false\.$~'
         - '~^Method Doctrine\\DBAL\\Driver\\IBMDB2\\Result\:\:rowCount\(\) should return int but returns int<0, max>\|false\.$~'
+
+        # This is a rather complicated closure setup. We understand this, so PHPStan doesn't have to.
+        -
+            message: '#^Parameter \#2 \$callback of function array_reduce expects callable\(\(callable&TIn\)\|Closure\(mixed \$value\)\: mixed\|null, callable\(T\)\: T\)\: \(\(callable&TIn\)\|Closure\(mixed \$value\)\: mixed\|null\), Closure\(callable\|null, callable\)\: \(callable\(T\)\: T\) given\.$#'
+            path: src/Portability/Converter.php
+
 includes:
     - vendor/phpstan/phpstan-strict-rules/rules.neon