diff --git a/internal/sync/progress.go b/internal/sync/progress.go
index e350e62..e67834c 100644
--- a/internal/sync/progress.go
+++ b/internal/sync/progress.go
@@ -14,9 +14,9 @@ type ProgressData struct {
 	Chapter         *int     `json:"chapter,omitempty"`
 	ChapterProgress *float64 `json:"chapter_progress,omitempty"`
 	ViewportY       *float64 `json:"viewport_y,omitempty"`
-	Page            *int     `int,omitempty"`
-	TotalPages      *int     `int,omitempty"`
-	PageY           *int     `int,omitempty"`
+	Page            *int     `json:"page,omitempty"`
+	TotalPages      *int     `json:"total_pages,omitempty"`
+	PageY           *int     `json:"page_y,omitempty"`
 	Zoom            *float64 `json:"zoom,omitempty"`
 	ScrollX         *float64 `json:"scroll_x,omitempty"`
 	ScrollY         *float64 `json:"scroll_y,omitempty"`