diff --git a/Dockerfile b/Dockerfile
index 4818439..407d1c6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/* && \
     useradd -u 1000 -ms /bin/bash tt && \
     useradd -u 1001 -ms /bin/bash student && \
-    echo "student ALL=(tt) /usr/local/bin/joj3" > /etc/sudoers.d/joj
+    echo "student ALL=(tt) NOPASSWD:/usr/local/bin/joj3" > /etc/sudoers.d/joj
 
 # install joint-teapot
 # TODO: change it to FOCS gitea mirror for deployment