diff --git a/README.md b/README.md
index e2804f5e..8a0f158e 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@
 ## Features
 
 * No statically built html files
-* Simple and lightweight (~18kB gzipped)
+* Simple and lightweight (~19kB gzipped)
 * Smart full-text search plugin
 * Multiple themes
 * Useful plugin API
@@ -99,7 +99,6 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
 This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
 <a href="graphs/contributors"><img src="https://opencollective.com/docsify/contributors.svg?width=890" /></a>
 
-
 ## License
 
 MIT
diff --git a/docs/de-de/embed-files.md b/docs/de-de/embed-files.md
index 93c653b8..a935dd37 100644
--- a/docs/de-de/embed-files.md
+++ b/docs/de-de/embed-files.md
@@ -23,7 +23,7 @@ Currently, file extension are automatically recognized and embedded in different
 
 This is a supported embedding type:
 
-* **iframe** `.html`, `.html`
+* **iframe** `.html`, `.htm`
 * **markdown** `.markdown`, `.md`
 * **audio** `.mp3`
 * **video** `.mp4`, `.ogg`
diff --git a/docs/embed-files.md b/docs/embed-files.md
index 93c653b8..a935dd37 100644
--- a/docs/embed-files.md
+++ b/docs/embed-files.md
@@ -23,7 +23,7 @@ Currently, file extension are automatically recognized and embedded in different
 
 This is a supported embedding type:
 
-* **iframe** `.html`, `.html`
+* **iframe** `.html`, `.htm`
 * **markdown** `.markdown`, `.md`
 * **audio** `.mp3`
 * **video** `.mp4`, `.ogg`
diff --git a/docs/zh-cn/embed-files.md b/docs/zh-cn/embed-files.md
index 6bee0d9b..92c93ec1 100644
--- a/docs/zh-cn/embed-files.md
+++ b/docs/zh-cn/embed-files.md
@@ -20,7 +20,7 @@ docsify 4.6 开始支持嵌入任何类型的文件到文档里。你可以将
 
 当前，嵌入的类型是通过文件后缀自动识别的，这是目前支持的类型：
 
-* **iframe** `.html`, `.html`
+* **iframe** `.html`, `.htm`
 * **markdown** `.markdown`, `.md`
 * **audio** `.mp3`
 * **video** `.mp4`, `.ogg`