diff --git a/docs/install.md b/docs/install.md
index efa5beb532..0b142af900 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -5,7 +5,7 @@
 - PyTorch 1.3 or higher
 - CUDA 9.0 or higher
 - NCCL 2
-- GCC 4.9 or higher
+- GCC 5.4 or higher
 - [mmcv](https://github.com/open-mmlab/mmcv)
 
 ## Installation
diff --git a/docs_zh-CN/install.md b/docs_zh-CN/install.md
index 1ec804f4e8..348dcf87aa 100644
--- a/docs_zh-CN/install.md
+++ b/docs_zh-CN/install.md
@@ -5,7 +5,7 @@
 - PyTorch 1.3 或更高
 - CUDA 9.0 或更高
 - NCCL 2
-- GCC 4.9 或更高
+- GCC 5.4 或更高
 - [mmcv](https://github.com/open-mmlab/mmcv)
 
 ## 安装