diff --git a/Dockerfile b/Dockerfile
index 8b0a515..512b4f8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,9 +18,10 @@ RUN apt-get update && \
             sudo \
             && \
     rm -rf /var/lib/apt/lists/* && \
-    printf "\npostgres  ALL = (ALL) NOPASSWD:ALL\n" >> /etc/sudoers && \
-    printf "\nX11Forwarding no\nPasswordAuthentication no\n" >> /etc/ssh/sshd_config && \
-    printf "\nStrictHostKeyChecking no\n" >> /etc/ssh/ssh_config
+    echo "postgres  ALL = (ALL) NOPASSWD:ALL" >> /etc/sudoers && \
+    echo "X11Forwarding no" >> /etc/ssh/sshd_config && \
+    echo "PasswordAuthentication no" >> /etc/ssh/sshd_config && \
+    echo "StrictHostKeyChecking no" >> /etc/ssh/ssh_config
 
 COPY --chown=postgres:postgres postgres /var/lib/postgresql/