diff --git a/api.go b/api.go
index 860c96f..f4c0560 100644
--- a/api.go
+++ b/api.go
@@ -181,8 +181,8 @@ func (api *Api) getChapterEntriesByPageIndex(ctx context.Context, novelID NovelI
 	entryElems.Each(func(i int, s *goquery.Selection) {
 		td3 := s.Find("td:nth-child(3) a.chp-release")
 
-		chapterID := ChapterID(td3.Text())
-		groupID := GroupID(path.Base(s.Find("td:nth-child(2) a").AttrOr("href", "")))
+		chapterID := td3.Text()
+		groupID := path.Base(s.Find("td:nth-child(2) a").AttrOr("href", ""))
 		link := "https:" + td3.AttrOr("href", "")
 
 		date, err := time.Parse("01/02/06", strings.TrimSpace(s.Find("td:first-child").Text()))
diff --git a/types.go b/types.go
index be2e02c..f60bfc7 100644
--- a/types.go
+++ b/types.go
@@ -5,10 +5,10 @@ import (
 	"time"
 )
 
-type NovelID string
-type ChapterID string
-type ReadingListID string
-type GroupID string
+type NovelID = string
+type ChapterID = string
+type ReadingListID = string
+type GroupID = string
 
 type ReadingList struct {
 	ID      ReadingListID      `json:"id"`