diff --git a/composer.json b/composer.json
index ee007c67..e7aba8f0 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
   "name": "exercism/php",
   "autoload": {
-    "Exercism\\": "src",
+    "Exercism\\Sniffs\\": "src/Exercism/Sniffs",
     "Exercism\\Exercises\\": "exercises"
   },
   "config": {
@@ -13,7 +13,7 @@
     "php": "^8.1",
     "phpunit/phpunit": "^10.5",
     "slevomat/coding-standard": "^8.14.1",
-    "squizlabs/php_codesniffer": "^3.9"
+    "squizlabs/php_codesniffer": "^3.11.1"
   },
   "scripts": {
     "post-install-cmd": [
diff --git a/phpcs.xml b/phpcs.xml
index b31d1cf6..c88f737e 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -34,7 +34,7 @@
     <exclude-pattern>*/concept/city-office/*</exclude-pattern>
     <exclude-pattern>*/concept/windowing-system/*</exclude-pattern>
   </rule>
-  <rule ref="vendor/slevomat/coding-standard/SlevomatCodingStandard/Sniffs/TypeHints/DeclareStrictTypesSniff.php">
+  <rule ref="SlevomatCodingStandard.TypeHints.DeclareStrictTypes">
     <exclude-pattern>*/.meta/*\.php</exclude-pattern>
     <exclude-pattern>*/concept/*</exclude-pattern>
     <exclude-pattern>*/hello-world/*</exclude-pattern>
@@ -44,7 +44,7 @@
       <property name="spacesCountAroundEqualsSign" value="0" />
     </properties>
   </rule>
-  <rule ref="src/Sniffs/ExplainStrictTypesSniff.php">
+  <rule ref="src/Exercism/Sniffs/StrictTypes/ExplainStrictTypesSniff.php">
     <exclude-pattern>*/*Test\.php</exclude-pattern>
     <exclude-pattern>*/.meta/*\.php</exclude-pattern>
     <exclude-pattern>src/*</exclude-pattern>
diff --git a/src/Sniffs/ExplainStrictTypesSniff.php b/src/Exercism/Sniffs/StrictTypes/ExplainStrictTypesSniff.php
similarity index 85%
rename from src/Sniffs/ExplainStrictTypesSniff.php
rename to src/Exercism/Sniffs/StrictTypes/ExplainStrictTypesSniff.php
index 5b9a4d31..f232391a 100644
--- a/src/Sniffs/ExplainStrictTypesSniff.php
+++ b/src/Exercism/Sniffs/StrictTypes/ExplainStrictTypesSniff.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Exercism\Sniffs;
+namespace Exercism\Sniffs\StrictTypes;
 
 use PHP_CodeSniffer\Files\File;
 use PHP_CodeSniffer\Fixer;
@@ -48,16 +48,16 @@ public function register(): array
         ];
     }
 
-    public function process(File $file, $stackPtr)
+    public function process(File $phpcsFile, $stackPtr): void
     {
-        $this->fixer = $file->fixer;
+        $this->fixer = $phpcsFile->fixer;
         $this->position = $stackPtr;
 
-        if (!$file->findPrevious($this->tokens, $stackPtr)) {
-            $file->addFixableError(
+        if (!$phpcsFile->findPrevious($this->tokens, $stackPtr)) {
+            $phpcsFile->addFixableError(
                 'Missing explanation of declaration of strict types.',
                 $stackPtr - 1,
-                self::class
+                'Missing'
             );
             $this->fix();
         }