diff --git a/Dockerfile b/Dockerfile
index aac7e7a..a53f81a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,9 +3,7 @@ MAINTAINER Liang Ding <dl88250@gmail.com>
 
 ADD . /wide/gogogo/src/github.com/b3log/wide
 
-RUN useradd wide && chown -R wide:wide /wide && useradd wide_runner
-
-USER wide
+RUN useradd runner
 
 ENV GOROOT /usr/src/go
 ENV GOPATH /wide/gogogo
diff --git a/output/outputs.go b/output/outputs.go
index f5417b9..e9e4ead 100644
--- a/output/outputs.go
+++ b/output/outputs.go
@@ -110,12 +110,12 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 	cmd.SysProcAttr = &syscall.SysProcAttr{}
 	cmd.SysProcAttr.Cloneflags = syscall.CLONE_NEWUSER | syscall.CLONE_NEWNS | syscall.CLONE_NEWUTS | syscall.CLONE_NEWPID | syscall.CLONE_NEWIPC | syscall.CLONE_NEWNET
 	cmd.SysProcAttr.Credential = &syscall.Credential{
-		Uid: 1001,
-		Gid: 1001,
+		Uid: 0,
+		Gid: 0,
 	}
 
-	cmd.SysProcAttr.UidMappings = []syscall.SysProcIDMap{{ContainerID: 1001, HostID: 1001, Size: 1}}
-	cmd.SysProcAttr.GidMappings = []syscall.SysProcIDMap{{ContainerID: 1001, HostID: 1001, Size: 1}}
+	cmd.SysProcAttr.UidMappings = []syscall.SysProcIDMap{{ContainerID: 0, HostID: 1000, Size: 1}}
+	cmd.SysProcAttr.GidMappings = []syscall.SysProcIDMap{{ContainerID: 0, HostID: 1000, Size: 1}}
 
 	stdout, err := cmd.StdoutPipe()
 	if nil != err {