diff --git a/src/CompilerException.php b/src/CompilerException.php
index 44535cd..d08345c 100644
--- a/src/CompilerException.php
+++ b/src/CompilerException.php
@@ -8,6 +8,9 @@ class CompilerException extends Exception
 {
     public string $output;
 
+    /**
+     * @param array<int, string> $output
+     */
     public function setOutput(array $output): self
     {
         $this->output = implode("\n", $output);