diff --git a/common/subtitle-reader/subtitle-reader.ts b/common/subtitle-reader/subtitle-reader.ts
index f9a6d37b..5a8e5d2d 100755
--- a/common/subtitle-reader/subtitle-reader.ts
+++ b/common/subtitle-reader/subtitle-reader.ts
@@ -5,7 +5,7 @@ import { XMLParser } from 'fast-xml-parser';
 import { SubtitleTextImage } from '@project/common';
 
 const tagRegex = RegExp(/<([^>]+)>([^]*)<\/\1>/, 'ig');
-const vttClassRegex = /<(\/)?c.[^>]+>/g;
+const vttClassRegex = /<(\/)?c(\.[^>]*)?>/g;
 const assNewLineRegex = RegExp(/\\[nN]/, 'ig');
 const helperElement = document.createElement('div');