diff --git a/internal/core/jwt.go b/internal/core/jwt.go
index 0f5a19e..4515334 100644
--- a/internal/core/jwt.go
+++ b/internal/core/jwt.go
@@ -6,8 +6,8 @@ import (
 
 type JWTClaims struct {
 	jwt.RegisteredClaims
-	AccountId string `json:"account_id"`
-	RoleId    string `json:"role_id"`
+	AccountId int `json:"account_id"`
+	RoleId    int `json:"role_id"`
 }
 
 var jwtSecret string
diff --git a/internal/core/jwt_test.go b/internal/core/jwt_test.go
new file mode 100644
index 0000000..d9dce0f
--- /dev/null
+++ b/internal/core/jwt_test.go
@@ -0,0 +1,29 @@
+package core
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestJWT_GenerateToken(t *testing.T) {
+	InitJWT("secret")
+
+	token, err := SignJWT(JWTClaims{
+		AccountId: 1,
+		RoleId:    1,
+	})
+	if err != nil {
+		t.Fatalf("Failed to generate token: %v", err)
+	}
+
+	assert.NotEmpty(t, token)
+
+	claims, err := VerifyJWT(token)
+	if err != nil {
+		t.Fatalf("Failed to verify token: %v", err)
+	}
+
+	assert.Equal(t, claims.AccountId, 1)
+	assert.Equal(t, claims.RoleId, 1)
+}