diff --git a/app/src/main/java/io/legado/app/constant/AppPattern.kt b/app/src/main/java/io/legado/app/constant/AppPattern.kt
index fafe15ccf..6727bb472 100644
--- a/app/src/main/java/io/legado/app/constant/AppPattern.kt
+++ b/app/src/main/java/io/legado/app/constant/AppPattern.kt
@@ -12,7 +12,7 @@ object AppPattern {
     val imgPattern: Pattern = Pattern.compile("<img[^>]*src=\"([^\"]*(?:\"[^>]+\\})?)\"[^>]*>")
 
     //dataURL图片类型
-    val dataUriRegex = Regex("data:.*?;base64,(.*)")
+    val dataUriRegex = Regex("^data:.*?;base64,(.*)")
 
     val nameRegex = Regex("\\s+作\\s*者.*|\\s+\\S+\\s+著")
     val authorRegex = Regex("^\\s*作\\s*者[:：\\s]+|\\s+著")