diff --git a/.changeset/warm-ducks-provide.md b/.changeset/warm-ducks-provide.md
new file mode 100644
index 0000000..e34d632
--- /dev/null
+++ b/.changeset/warm-ducks-provide.md
@@ -0,0 +1,5 @@
+---
+'@ssecd/jkn': patch
+---
+
+fix types
diff --git a/src/index.ts b/src/index.ts
index 0904484..c89c39d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -6,10 +6,6 @@ import { ICare } from './icare.js';
 import { PCare } from './pcare/index.js';
 import { VClaim } from './vclaim/index.js';
 
-type JKNResponseType<T extends object, K extends keyof T> = NonNullable<
-	'response' extends keyof Awaited<ReturnType<T[K]>> ? Awaited<ReturnType<T[K]>>['response'] : never
->;
-
 export default class JKN extends Fetcher {
 	private readonly cache = new CachedApi(this);
 
@@ -39,9 +35,17 @@ export default class JKN extends Fetcher {
 	}
 }
 
+type JKNResponseType<T extends object, K extends keyof T> = NonNullable<
+	// @ts-expect-error T[K] will always a method of class T
+	'response' extends keyof Awaited<ReturnType<T[K]>> ? Awaited<ReturnType<T[K]>>['response'] : never
+>;
+
+// cannot use built-in Parameters type helper with class type that return from method eg. VClaim[T][K]
+type MethodParameters<T> = T extends (...args: infer P) => unknown ? P : never;
+
 export type AntreanResponse<K extends keyof Antrean> = JKNResponseType<Antrean, K>;
 
-export type AntreanParams<K extends keyof Antrean> = Parameters<Antrean[K]>;
+export type AntreanParams<K extends keyof Antrean> = MethodParameters<Antrean[K]>;
 
 export type VClaimResponse<
 	T extends keyof VClaim, //
@@ -51,7 +55,7 @@ export type VClaimResponse<
 export type VClaimParams<
 	T extends keyof VClaim, //
 	K extends keyof VClaim[T]
-> = Parameters<VClaim[T][K]>;
+> = MethodParameters<VClaim[T][K]>;
 
 export type ApotekResponse<
 	T extends keyof Apotek, //
@@ -61,4 +65,8 @@ export type ApotekResponse<
 export type ApotekParams<
 	T extends keyof Apotek, //
 	K extends keyof Apotek[T]
-> = Parameters<Apotek[T][K]>;
+> = MethodParameters<Apotek[T][K]>;
+
+export type ICareResponse<K extends keyof ICare> = JKNResponseType<ICare, K>;
+
+export type ICareParams<K extends keyof ICare> = MethodParameters<ICare[K]>;
diff --git a/tsconfig.json b/tsconfig.json
index 89fa37e..452b031 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,7 @@
 		"resolveJsonModule": true,
 		"moduleResolution": "NodeNext",
 		"strict": true,
-		"module": "esnext",
+		"module": "NodeNext",
 		"target": "esnext",
 		"lib": ["esnext", "DOM"],
 		"outDir": "dist",