diff --git a/tensorflow2fluid/doc/tf.case.md b/tensorflow2fluid/doc/tf.case.md
index b0af6e57cf6526406d6d27d81e6acdacd425d0c3..42f97771a471b27f02fe88dc952363d91c6dd950 100644
--- a/tensorflow2fluid/doc/tf.case.md
+++ b/tensorflow2fluid/doc/tf.case.md
@@ -12,7 +12,7 @@ tf.case(
 )
 ```
 
-### [paddle.fluid.layers.While](http://paddlepaddle.org/documentation/docs/zh/1.3/api_cn/layers_cn.html#while)
+### [paddle.fluid.layers.While](http://paddlepaddle.org/documentation/docs/zh/1.4/api_cn/layers_cn.html#while)
 ```python
 class paddle.fluid.layers.Switch(
     name=None