diff --git a/packages/PHPStanStaticTypeMapper/TypeMapper/UnionTypeMapper.php b/packages/PHPStanStaticTypeMapper/TypeMapper/UnionTypeMapper.php
index d09ce20d944..cc63c37e16c 100644
--- a/packages/PHPStanStaticTypeMapper/TypeMapper/UnionTypeMapper.php
+++ b/packages/PHPStanStaticTypeMapper/TypeMapper/UnionTypeMapper.php
@@ -140,6 +140,13 @@ final class UnionTypeMapper implements TypeMapperInterface
             // use first unioned type in case of unioned object types
             return $this->matchTypeForUnionedObjectTypes($type, $typeKind);
         }
+        return $this->mapNullabledType($nullabledType, $typeKind);
+    }
+    /** 
+     * @param TypeKind::* $typeKind
+     */
+    private function mapNullabledType(Type $nullabledType, string $typeKind) : ?Node
+    {
         // void cannot be nullable
         if ($nullabledType instanceof VoidType) {
             return null;
@@ -152,7 +159,7 @@ final class UnionTypeMapper implements TypeMapperInterface
             return $nullabledTypeNode;
         }
         /** @var Name $nullabledTypeNode */
-        if (!$this->nodeNameResolver->isName($nullabledTypeNode, 'false')) {
+        if (!$this->nodeNameResolver->isNames($nullabledTypeNode, ['false', 'mixed'])) {
             return new NullableType($nullabledTypeNode);
         }
         return null;
diff --git a/rules/TypeDeclaration/TypeAnalyzer/AlwaysStrictScalarExprAnalyzer.php b/rules/TypeDeclaration/TypeAnalyzer/AlwaysStrictScalarExprAnalyzer.php
index be3d789598c..2054f0262ac 100644
--- a/rules/TypeDeclaration/TypeAnalyzer/AlwaysStrictScalarExprAnalyzer.php
+++ b/rules/TypeDeclaration/TypeAnalyzer/AlwaysStrictScalarExprAnalyzer.php
@@ -17,6 +17,7 @@ use PHPStan\Analyser\Scope;
 use PHPStan\Reflection\Native\NativeFunctionReflection;
 use PHPStan\Reflection\ReflectionProvider;
 use PHPStan\Type\BooleanType;
+use PHPStan\Type\Constant\ConstantStringType;
 use PHPStan\Type\FloatType;
 use PHPStan\Type\IntegerType;
 use PHPStan\Type\NullType;
@@ -51,10 +52,33 @@ final class AlwaysStrictScalarExprAnalyzer
             return null;
         }
         if ($expr instanceof FuncCall) {
-            return $this->resolveFuncCallType($expr);
+            $returnType = $this->resolveFuncCallType($expr);
+            if ($returnType === null) {
+                return null;
+            }
+            if (!$this->isScalarType($returnType)) {
+                return null;
+            }
+            return $returnType;
         }
         return null;
     }
+    private function isScalarType(Type $type) : bool
+    {
+        if ($type instanceof StringType && !$type instanceof ConstantStringType) {
+            return \true;
+        }
+        if ($type instanceof FloatType) {
+            return \true;
+        }
+        if ($type instanceof IntegerType) {
+            return \true;
+        }
+        if ($type instanceof BooleanType) {
+            return \true;
+        }
+        return \false;
+    }
     private function resolveTypeFromScalar(Scalar $scalar) : ?\PHPStan\Type\Type
     {
         if ($scalar instanceof String_) {
diff --git a/src/Application/VersionResolver.php b/src/Application/VersionResolver.php
index 4b972414da7..0c3f0efd313 100644
--- a/src/Application/VersionResolver.php
+++ b/src/Application/VersionResolver.php
@@ -17,12 +17,12 @@ final class VersionResolver
      * @api
      * @var string
      */
-    public const PACKAGE_VERSION = 'df36e385def96b447520c35e341e46e16cbffb56';
+    public const PACKAGE_VERSION = '54cc8e7a839343023a10a4ee230b9973dd03c376';
     /**
      * @api
      * @var string
      */
-    public const RELEASE_DATE = '2022-09-23 10:40:42';
+    public const RELEASE_DATE = '2022-09-23 14:59:11';
     /**
      * @var int
      */
diff --git a/vendor/autoload.php b/vendor/autoload.php
index c8ddf0cf6e6..dd74d4dbcfe 100644
--- a/vendor/autoload.php
+++ b/vendor/autoload.php
@@ -9,4 +9,4 @@ if (PHP_VERSION_ID < 50600) {
 
 require_once __DIR__ . '/composer/autoload_real.php';
 
-return ComposerAutoloaderIniteb1a4d23182d7d3e5a5f84f5ed6003ab::getLoader();
+return ComposerAutoloaderInita2b31b9158f64e76ddef912f18cd5d8a::getLoader();
diff --git a/vendor/composer/autoload_real.php b/vendor/composer/autoload_real.php
index bdb7766d51e..62020021ae0 100644
--- a/vendor/composer/autoload_real.php
+++ b/vendor/composer/autoload_real.php
@@ -2,7 +2,7 @@
 
 // autoload_real.php @generated by Composer
 
-class ComposerAutoloaderIniteb1a4d23182d7d3e5a5f84f5ed6003ab
+class ComposerAutoloaderInita2b31b9158f64e76ddef912f18cd5d8a
 {
     private static $loader;
 
@@ -22,19 +22,19 @@ class ComposerAutoloaderIniteb1a4d23182d7d3e5a5f84f5ed6003ab
             return self::$loader;
         }
 
-        spl_autoload_register(array('ComposerAutoloaderIniteb1a4d23182d7d3e5a5f84f5ed6003ab', 'loadClassLoader'), true, true);
+        spl_autoload_register(array('ComposerAutoloaderInita2b31b9158f64e76ddef912f18cd5d8a', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader(\dirname(__DIR__));
-        spl_autoload_unregister(array('ComposerAutoloaderIniteb1a4d23182d7d3e5a5f84f5ed6003ab', 'loadClassLoader'));
+        spl_autoload_unregister(array('ComposerAutoloaderInita2b31b9158f64e76ddef912f18cd5d8a', 'loadClassLoader'));
 
         require __DIR__ . '/autoload_static.php';
-        call_user_func(\Composer\Autoload\ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab::getInitializer($loader));
+        call_user_func(\Composer\Autoload\ComposerStaticInita2b31b9158f64e76ddef912f18cd5d8a::getInitializer($loader));
 
         $loader->setClassMapAuthoritative(true);
         $loader->register(true);
 
-        $includeFiles = \Composer\Autoload\ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab::$files;
+        $includeFiles = \Composer\Autoload\ComposerStaticInita2b31b9158f64e76ddef912f18cd5d8a::$files;
         foreach ($includeFiles as $fileIdentifier => $file) {
-            composerRequireeb1a4d23182d7d3e5a5f84f5ed6003ab($fileIdentifier, $file);
+            composerRequirea2b31b9158f64e76ddef912f18cd5d8a($fileIdentifier, $file);
         }
 
         return $loader;
@@ -46,7 +46,7 @@ class ComposerAutoloaderIniteb1a4d23182d7d3e5a5f84f5ed6003ab
  * @param string $file
  * @return void
  */
-function composerRequireeb1a4d23182d7d3e5a5f84f5ed6003ab($fileIdentifier, $file)
+function composerRequirea2b31b9158f64e76ddef912f18cd5d8a($fileIdentifier, $file)
 {
     if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
         $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
diff --git a/vendor/composer/autoload_static.php b/vendor/composer/autoload_static.php
index 03aa83a4633..f364b056b9e 100644
--- a/vendor/composer/autoload_static.php
+++ b/vendor/composer/autoload_static.php
@@ -4,7 +4,7 @@
 
 namespace Composer\Autoload;
 
-class ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab
+class ComposerStaticInita2b31b9158f64e76ddef912f18cd5d8a
 {
     public static $files = array (
         'ad155f8f1cf0d418fe49e248db8c661b' => __DIR__ . '/..' . '/react/promise/src/functions_include.php',
@@ -3107,9 +3107,9 @@ class ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab::$prefixLengthsPsr4;
-            $loader->prefixDirsPsr4 = ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab::$prefixDirsPsr4;
-            $loader->classMap = ComposerStaticIniteb1a4d23182d7d3e5a5f84f5ed6003ab::$classMap;
+            $loader->prefixLengthsPsr4 = ComposerStaticInita2b31b9158f64e76ddef912f18cd5d8a::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInita2b31b9158f64e76ddef912f18cd5d8a::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInita2b31b9158f64e76ddef912f18cd5d8a::$classMap;
 
         }, null, ClassLoader::class);
     }