diff --git a/app/src/main/java/ua/acclorite/book_story/presentation/screens/reader/data/ReaderViewModel.kt b/app/src/main/java/ua/acclorite/book_story/presentation/screens/reader/data/ReaderViewModel.kt
index 08d0115d..8810ab8a 100644
--- a/app/src/main/java/ua/acclorite/book_story/presentation/screens/reader/data/ReaderViewModel.kt
+++ b/app/src/main/java/ua/acclorite/book_story/presentation/screens/reader/data/ReaderViewModel.kt
@@ -649,8 +649,8 @@ class ReaderViewModel @Inject constructor(
                 return 1f
             }
 
-            return@run (firstVisibleItemIndex ?: listState.firstVisibleItemIndex) /
-                    (text.lastIndex).toFloat()
+            return@run ((firstVisibleItemIndex ?: listState.firstVisibleItemIndex) /
+                    (text.lastIndex).toFloat()).coerceIn(0f, 1f)
         }
     }