diff --git a/doc/v2/build_and_install/docker_install_en.rst b/doc/v2/build_and_install/docker_install_en.rst
index 5dbdedc4cb064ef415e8d19f00727a16d1c175c6..25aecb8d0da9feb00006da6259b529b7011d91cb 100644
--- a/doc/v2/build_and_install/docker_install_en.rst
+++ b/doc/v2/build_and_install/docker_install_en.rst
@@ -105,7 +105,7 @@ We provide a packaged book image, simply issue the command:
 
 For users in China, we provide a faster mirror:
 
-  .. code-block: bash
+  .. code-block:: bash
 
     docker run -p 8888:8888 docker.paddlepaddlehub.com/book