diff --git a/src/Option/Type/Base.php b/src/Option/Type/Base.php
index f8e2f51..535a0a7 100644
--- a/src/Option/Type/Base.php
+++ b/src/Option/Type/Base.php
@@ -146,7 +146,7 @@ class Base
         $this->default = $default;
     }
 
-    public function getHelp(): string
+    public function getHelp(): ?string
     {
         return $this->help;
     }
@@ -161,7 +161,7 @@ class Base
         $this->helpLink = $var;
     }
 
-    public function getHelpLink(): string
+    public function getHelpLink(): ?string
     {
         return $this->helpLink;
     }