diff --git a/manual/build_seafile/server.md b/manual/build_seafile/server.md
index cc4cf277..a8817f80 100644
--- a/manual/build_seafile/server.md
+++ b/manual/build_seafile/server.md
@@ -60,7 +60,6 @@ cd ~/dev/source-code
 
 git clone https://github.com/haiwen/libevhtp.git
 git clone https://github.com/haiwen/libsearpc.git
-git clone https://github.com/haiwen/seafobj.git
 git clone https://github.com/haiwen/seafile-server.git
 git clone https://github.com/haiwen/seahub.git
 
@@ -73,9 +72,6 @@ git checkout tags/v8.0.0-server -b tag-v8.0.0-server
 
 cd ../seahub
 git checkout tags/v8.0.0-server -b tag-v8.0.0-server
-
-cd ../seafobj
-git checkout tags/v8.0.0-server -b tag-v8.0.0-server
 ```
 
 ## Compile and Install seaf-server