diff --git a/src/option.ts b/src/option.ts
index b2e7dba..f62f70c 100644
--- a/src/option.ts
+++ b/src/option.ts
@@ -74,7 +74,7 @@ export class None extends OptionTrait {
 
   public override readonly isNone = true;
 
-  private constructor() {
+  public constructor() {
     super();
   }