diff --git a/package.json b/package.json
index 45227df..e3c4652 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "typescript": "^4.0.2"
   },
   "dependencies": {
-    "@orioro/validate-type": "^1.3.1",
+    "@orioro/validate-type": "^1.4.0",
     "lodash": "^4.17.20"
   },
   "config": {
diff --git a/src/expression.ts b/src/expression.ts
index 8dd3f25..68c1a34 100644
--- a/src/expression.ts
+++ b/src/expression.ts
@@ -1,4 +1,6 @@
-import { validateType } from '@orioro/validate-type'
+import { validateType, ExpectedType } from '@orioro/validate-type'
+
+import { isPlainObject } from 'lodash'
 
 import {
   Expression,
@@ -116,32 +118,18 @@ type ParamResolverFunction = (context: EvaluationContext, arg: any) => any
  *
  * @typedef {Function | null | string | string[]} ParamResolver
  */
-type ParamType =
-  | 'string'
-  | 'regexp'
-  | 'number'
-  | 'bigint'
-  | 'nan'
-  | 'null'
-  | 'undefined'
-  | 'boolean'
-  | 'function'
-  | 'object'
-  | 'array'
-  | 'date'
-  | 'symbol'
-  | 'map'
-  | 'set'
-  | 'weakmap'
-  | 'weakset'
-  | 'any'
 export type ParamResolver =
   | ParamResolverFunction
   | null
-  | ParamType
-  | ParamType[]
+  | ExpectedType
+  | ExpectedType[]
+
+const _paramResolverNoop = (context: EvaluationContext, arg: any): any => arg
 
-const paramResolverNoop = (context: EvaluationContext, arg: any): any => arg
+const _isExpectedType = (resolver: ParamResolver): boolean =>
+  Array.isArray(resolver) ||
+  isPlainObject(resolver) ||
+  typeof resolver === 'string'
 
 /**
  * @function interpreter
@@ -178,12 +166,12 @@ export const interpreter = (
     const _paramResolvers = paramResolvers.map((resolver) => {
       if (typeof resolver === 'function') {
         return resolver
-      } else if (Array.isArray(resolver) || typeof resolver === 'string') {
+      } else if (_isExpectedType(resolver)) {
         return resolver === 'any'
           ? evaluate
           : evaluateTyped.bind(null, resolver)
       } else if (resolver === null) {
-        return paramResolverNoop
+        return _paramResolverNoop
       } else {
         throw new TypeError(
           `Expected resolver to be either Function | ExpectedType | 'any' | null, but got ${typeof resolver}: ${resolver}`
diff --git a/yarn.lock b/yarn.lock
index fad1122..ebdeb97 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1264,10 +1264,10 @@
     vinyl-fs "^3.0.3"
     yargs "^16.2.0"
 
-"@orioro/validate-type@^1.3.1":
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/@orioro/validate-type/-/validate-type-1.3.1.tgz#9f667bc189782e30daf306da7aa9d2e272504ff8"
-  integrity sha512-pNnpsEIPms9COh2I4dMqfqrIhtL7b7lv0tFtkV3kYjxRE22G35M3GqgYXnYxPPcOt+nXcCv02rCwtuAJmoQ2Pw==
+"@orioro/validate-type@^1.4.0":
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/@orioro/validate-type/-/validate-type-1.4.0.tgz#2a60a7cbfcb540d81654417a10c8404e3e98f89b"
+  integrity sha512-z9JdQxLUFbrIMZCBy2Xwzn82VDiR5wonNBDgAtCI4vHi2wJMODNv6P7oIk77K/fmq60RKJ2IElduV9AP4dm+4Q==
 
 "@rollup/plugin-babel@^5.2.0":
   version "5.2.3"