diff --git a/Backend/Dockerfile b/Backend/Dockerfile
index 86d2fb6ef2..1000df8198 100644
--- a/Backend/Dockerfile
+++ b/Backend/Dockerfile
@@ -33,9 +33,8 @@ RUN apt-get update \
 # Create the home directory for the new app user.
 RUN mkdir -p $HOME
 
-# Create an app user so the program doesn't run as root.
-RUN groupadd -r app && \
-  useradd -r -g app -d $HOME -s /sbin/nologin -c "Docker image user" app
+# Modify the existing app user to prevent login.
+RUN usermod -s /sbin/nologin -c "Docker image user" app
 
 ## Set up application install directory.
 RUN mkdir $APP_HOME && \