diff --git a/src/Parser.ts b/src/Parser.ts
index 1acb48c..d30b080 100644
--- a/src/Parser.ts
+++ b/src/Parser.ts
@@ -23,7 +23,7 @@ type ParserOptions = {
     commands: Iterable<Command>,
     prefix?: string,
     debug?: boolean,
-    resolver?: IResolver<unknown, unknown, unknown, unknown, unknown>,
+    resolver?: IResolver,
     allowDefaultOnRequired?: boolean
 }
 
@@ -42,7 +42,7 @@ class Parser extends EventEmitter {
     private commands: ExtendedMap<string, Command>;
     private _debug = false;
     prefix: string;
-    resolver?: IResolver<unknown, unknown, unknown, unknown, unknown>;
+    resolver?: IResolver;
     allowDefaultOnRequired: boolean;
 
     constructor ({ commands, prefix, debug = false, resolver, allowDefaultOnRequired }: ParserOptions) {