diff --git a/Dockerfile b/Dockerfile
index 96b0140..4ac001b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ apt-get update && apt-get upgrade
 chmod +x /bin/bubble
 apt-get install -y curl jq neovim htop fish tmux sudo git
 useradd -m -s /usr/bin/fish user
-echo "user ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/user.conf
+echo "user ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/user.conf
 sudo -u user mkdir -p /home/user/.config/fish/
 EOF
 COPY ./init.fish /init.fish
diff --git a/user.fish b/user.fish
index 7ec15be..9fc2720 100644
--- a/user.fish
+++ b/user.fish
@@ -6,6 +6,10 @@ if test ! -e /bin/docker
     echo "Docker is not installed. Type 'install-docker' to install if needed."
 end
 
+function exit
+    tmux detach && exit
+end
+
 function install-docker
     if test -e /bin/docker
         echo "Docker is already present at /bin/docker."