diff --git a/Dockerfile b/Dockerfile
index 6379ba5..278607b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ RUN sed -i s@/deb.debian.org/@/mirrors.tuna.tsinghua.edu.cn/@g /etc/apt/sources.
     useradd -u 1000 -ms /bin/bash tt && \
     useradd -u 1001 -ms /bin/bash student && \
     usermod -aG student tt && \
-    echo "student ALL=(tt) NOPASSWD:SETENV:/usr/local/bin/joj3\ntt ALL=(student) NOPASSWD:SETENV ALL" > /etc/sudoers.d/joj
+    echo "student ALL=(tt) NOPASSWD:SETENV:/usr/local/bin/joj3\ntt ALL=(student) NOPASSWD:SETENV:ALL" > /etc/sudoers.d/joj
 
 # install joint-teapot
 # TODO: change it to FOCS gitea mirror for deployment