Update install_en.md

docs/en/tutorials/install_en.md

@@ -8,7 +8,7 @@ This document introduces how to install PaddleClas and its requirements.
 
 ## Install PaddlePaddle
 
-Python 3.5, CUDA 9.0, CUDNN7.0 nccl2.1.2 and later version are required at first, For now, PaddleClas only support training on the GPU device. Please follow the instructions in the [Installation](http://www.paddlepaddle.org.cn/install/quick) if the PaddlePaddle on the device is lower than v1.7
+Python 3.5, CUDA 9.0, CUDNN7.0 nccl2.1.2 and later version are required at first, For now, PaddleClas only support training on the GPU device. Please follow the instructions in the [Installation](http://www.paddlepaddle.org.cn/install/quick) if the PaddlePaddle on the device is lower than PaddlePaddle-2.0rc.
 
 Install PaddlePaddle