diff --git a/README.md b/README.md
index 1037562..0303061 100644
--- a/README.md
+++ b/README.md
@@ -215,7 +215,7 @@ const schema: JSONSchemaType<Env> = {
   }
 }
 
-const config = envSchema({
+const config = envSchema<Env>({
   schema
 })
 ```
diff --git a/types/index.d.ts b/types/index.d.ts
index 9004d84..18f2289 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,5 +1,4 @@
 import Ajv, { KeywordDefinition, JSONSchemaType } from 'ajv';
-import { AnySchema } from 'ajv/dist/core';
 import { DotenvConfigOptions } from 'dotenv';
 
 type EnvSchema = typeof envSchema
@@ -11,8 +10,8 @@ declare namespace envSchema {
     [key: string]: unknown;
   };
 
-  export type EnvSchemaOpt<T = EnvSchemaData> = {
-    schema?: JSONSchemaType<T> | AnySchema;
+  export type EnvSchemaOpt = {
+    schema?: object;
     data?: [EnvSchemaData, ...EnvSchemaData[]] | EnvSchemaData;
     env?: boolean;
     dotenv?: boolean | DotenvConfigOptions;
@@ -32,5 +31,5 @@ declare namespace envSchema {
   export { envSchema as default }
 }
 
-declare function envSchema<T = envSchema.EnvSchemaData>(_opts?: envSchema.EnvSchemaOpt<T>): T
+declare function envSchema<T = envSchema.EnvSchemaData>(_opts?: envSchema.EnvSchemaOpt): T
 export = envSchema
diff --git a/types/index.test-d.ts b/types/index.test-d.ts
index cde6173..aed6970 100644
--- a/types/index.test-d.ts
+++ b/types/index.test-d.ts
@@ -8,6 +8,7 @@ import envSchema, {
 } from '..';
 import Ajv, { KeywordDefinition, JSONSchemaType } from 'ajv';
 import { Static, Type } from '@sinclair/typebox';
+import S from 'fluent-json-schema';
 
 interface EnvData {
   PORT: number;
@@ -24,6 +25,11 @@ const schemaWithType: JSONSchemaType<EnvData> = {
   },
 };
 
+const schemaFluent = S.object().prop(
+  'PORT',
+  S.number().default(3000).required()
+);
+
 const schemaTypebox = Type.Object({
   PORT: Type.Number({ default: 3000 }),
 });
@@ -41,15 +47,20 @@ expectType<EnvSchemaData>(envSchemaDefault());
 const emptyOpt: EnvSchemaOpt = {};
 expectType<EnvSchemaOpt>(emptyOpt);
 
+const optWithSchemaFluent: EnvSchemaOpt = {
+  schema: schemaFluent,
+};
+expectType<EnvSchemaOpt>(optWithSchemaFluent);
+
 const optWithSchemaTypebox: EnvSchemaOpt = {
   schema: schemaTypebox,
 };
 expectType<EnvSchemaOpt>(optWithSchemaTypebox);
 
-const optWithSchemaWithType: EnvSchemaOpt<EnvData> = {
+const optWithSchemaWithType: EnvSchemaOpt = {
   schema: schemaWithType,
 };
-expectType<EnvSchemaOpt<EnvData>>(optWithSchemaWithType);
+expectType<EnvSchemaOpt>(optWithSchemaWithType);
 
 const optWithData: EnvSchemaOpt = {
   data,
@@ -105,11 +116,11 @@ expectError<EnvSchemaOpt>({
   },
 });
 
-const envSchemaWithType = envSchema({ schema: schemaWithType });
+const envSchemaWithType = envSchema<EnvData>({ schema: schemaWithType });
 expectType<EnvData>(envSchemaWithType);
 
 const envSchemaTypebox = envSchema<SchemaTypebox>({ schema: schemaTypebox });
 expectType<SchemaTypebox>(envSchemaTypebox);
 
-expectType<KeywordDefinition>(keywords.separator)
-expectType<KeywordDefinition>(envSchema.keywords.separator)
+expectType<KeywordDefinition>(keywords.separator);
+expectType<KeywordDefinition>(envSchema.keywords.separator);