diff --git a/app/src/main/java/io/legado/app/model/rss/RssParser.kt b/app/src/main/java/io/legado/app/model/rss/RssParser.kt
index 7606bd43e..816a3858f 100644
--- a/app/src/main/java/io/legado/app/model/rss/RssParser.kt
+++ b/app/src/main/java/io/legado/app/model/rss/RssParser.kt
@@ -122,9 +122,9 @@ object RssParser {
         if (matcherImg.find()) {
             val imgTag = matcherImg.group(1)
             val patternLink = "src\\s*=\\s*\"(.+?)\"".toPattern()
-            val matcherLink = patternLink.matcher(imgTag)
+            val matcherLink = patternLink.matcher(imgTag!!)
             if (matcherLink.find()) {
-                url = matcherLink.group(1).trim()
+                url = matcherLink.group(1)!!.trim()
             }
         }
         return url