diff --git a/docs/switch_language.md b/docs/switch_language.md
index e69de29bb2..d33d0803ef 100644
--- a/docs/switch_language.md
+++ b/docs/switch_language.md
@@ -0,0 +1,3 @@
+## English
+
+## 简体中文
diff --git a/docs_zh-CN/switch_language.md b/docs_zh-CN/switch_language.md
index e69de29bb2..d33d0803ef 100644
--- a/docs_zh-CN/switch_language.md
+++ b/docs_zh-CN/switch_language.md
@@ -0,0 +1,3 @@
+## English
+
+## 简体中文
diff --git a/requirements/docs.txt b/requirements/docs.txt
index a1ecac32cb..fece607fe6 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -1,6 +1,6 @@
m2r
opencv-python
recommonmark
-sphinx==3.1.2
+sphinx
sphinx_markdown_tables
sphinx_rtd_theme