diff --git a/composer.json b/composer.json
index 3615442..5452a4d 100644
--- a/composer.json
+++ b/composer.json
@@ -7,12 +7,12 @@
   ],
   "license": "MIT",
   "require-dev": {
-    "phpunit/phpunit": "~9.5.4",
-    "squizlabs/php_codesniffer": "~3.5.8",
-    "php-coveralls/php-coveralls": "~2.4.3"
+    "phpunit/phpunit": "9.5.21",
+    "squizlabs/php_codesniffer": "3.7.1",
+    "php-coveralls/php-coveralls": "2.5.2"
   },
   "require": {
-    "phpugph/components": "~1.0.0"
+    "phpugph/components": "1.0.5"
   },
   "autoload": {
     "psr-4": {
diff --git a/src/HandlebarsHandler.php b/src/HandlebarsHandler.php
index 9c0011c..37fe485 100644
--- a/src/HandlebarsHandler.php
+++ b/src/HandlebarsHandler.php
@@ -79,13 +79,13 @@ public function compile($template)
 
     $file = $this->cache . '/' . $this->prefix . $name . '.php';
     // @codeCoverageIgnoreStart
-    if (is_dir($this->cache) && file_exists($file)) {
+    if (is_dir((string) $this->cache) && file_exists($file)) {
       $callback = include($file);
     } else {
       $code = $this->resolve(HandlebarsCompiler::class, $this, $template)
         ->compile();
 
-      if (is_dir($this->cache)) {
+      if (is_dir((string) $this->cache)) {
         file_put_contents($file, $code);
       }