diff --git a/_Sidebar.md b/_Sidebar.md
index 23087c1..34a5373 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -21,7 +21,7 @@
     * [参考文献](https://github.com/ElegantLaTeX/ElegantBook/wiki/参考文献)
     * [添加序章](https://github.com/ElegantLaTeX/ElegantBook/wiki/添加序章)
 	* [章节摘要](https://github.com/ElegantLaTeX/ElegantBook/wiki/章节摘要)
-	* [章后习题](https://github.com/ElegantLaTeX/ElegantBook/wiki/章后习题)	
+	* [章后习题](https://github.com/ElegantLaTeX/ElegantBook/wiki/章后习题)
     * [旁注](https://github.com/ElegantLaTeX/ElegantBook/wiki/旁注)  
     * [连字符](https://github.com/ElegantLaTeX/ElegantBook/wiki/连字符)     
     * [符号字体](https://github.com/ElegantLaTeX/ElegantBook/wiki/符号字体)    
@@ -71,6 +71,4 @@
 * [CTAN](https://ctan.org/pkg/elegantbook)
 * [Email](mailto:elegantlatex2e@gmail.com)
 * [Issues](https://github.com/ElegantLaTeX/ElegantBook/issues/new)
-* [Pull Request](https://github.com/ElegantLaTeX/ElegantBook/compare)
 * [ElegantLaTeX](https://elegantlatex.org/)
-