diff --git a/app/src/main/assets/updateLog.md b/app/src/main/assets/updateLog.md
index 1b94681df..8d8d9f7aa 100644
--- a/app/src/main/assets/updateLog.md
+++ b/app/src/main/assets/updateLog.md
@@ -13,7 +13,8 @@
 
 **2022/07/09**
 
-* 修复bug
+* 修复使用自建WebDav一些bug
+* 修复换源按钮长按只能生效一次的bug
 
 **2022/07/07**
 
diff --git a/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt b/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
index f4f6f35b2..da0d39aac 100644
--- a/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
@@ -321,7 +321,7 @@ class BookSourceEditActivity :
                 "loginCheckJs" -> source.loginCheckJs = it.value
                 "bookUrlPattern" -> source.bookUrlPattern = it.value
                 "header" -> source.header = it.value
-                "bookSourceComment" -> source.bookSourceComment = it.value ?: ""
+                "bookSourceComment" -> source.bookSourceComment = it.value
                 "concurrentRate" -> source.concurrentRate = it.value
                 "variableComment" -> source.variableComment = it.value
             }