diff --git a/src/index.ts b/src/index.ts
index fc8614b..4da9f40 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -154,12 +154,14 @@ JWTOption<Name, Schema>) => {
 				crit
 			})
 
-			if (morePayloadNbf !== undefined) {
-				jwt = jwt.setNotBefore(morePayloadNbf)
+			const setNbf = "nbf" in morePayload ? morePayloadNbf : nbf;
+			if (setNbf !== undefined) {
+				jwt = jwt.setNotBefore(setNbf)
 			}
 
-			if (morePayloadExp !== undefined) {
-				jwt = jwt.setExpirationTime(morePayloadExp)
+			const setExp = "exp" in morePayload ? morePayloadExp : exp;
+			if (setExp !== undefined) {
+				jwt = jwt.setExpirationTime(setExp)
 			}
 
 			return jwt.sign(key)
diff --git a/test/index.test.ts b/test/index.test.ts
index 664d8ac..c3a8391 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -27,10 +27,7 @@ describe('JWT Plugin', () => {
 		.post(
 			'/sign-token',
 			({ jwt, body }) =>
-				jwt.sign({
-					name: body.name,
-					exp: '30m'
-				}),
+				jwt.sign(body),
 			{
 				body: t.Object({
 					name: t.String()