diff --git a/debian-non-systemd/build.sh b/debian-non-systemd/build.sh
index c90a136..faee539 100644
--- a/debian-non-systemd/build.sh
+++ b/debian-non-systemd/build.sh
@@ -20,7 +20,7 @@ gzip -n -9 nvda-remote-server_$VERSION/usr/share/man/man5/NVDARemoteServer.conf.
 gzip -n -9 nvda-remote-server_$VERSION/usr/share/man/man1/NVDARemoteCertificate.1
 gzip -n -9 nvda-remote-server_$VERSION/usr/share/doc/nvda-remote-server/changelog.Debian
 #change permissions
-chown -R root.root nvda-remote-server_$VERSION
+chown -R root:root nvda-remote-server_$VERSION
 chmod -R 755 nvda-remote-server_$VERSION
 chmod 644 nvda-remote-server_$VERSION/DEBIAN/control
 chmod 644 nvda-remote-server_$VERSION/DEBIAN/conffiles
diff --git a/debian-py2/build.sh b/debian-py2/build.sh
index 192d88d..6f0bf79 100644
--- a/debian-py2/build.sh
+++ b/debian-py2/build.sh
@@ -26,7 +26,7 @@ gzip -n -9 nvda-remote-server_$VERSION/usr/share/man/man5/NVDARemoteServer.conf.
 gzip -n -9 nvda-remote-server_$VERSION/usr/share/man/man1/NVDARemoteCertificate.1
 gzip -n -9 nvda-remote-server_$VERSION/usr/share/doc/nvda-remote-server/changelog.Debian
 #change permissions
-chown -R root.root nvda-remote-server_$VERSION
+chown -R root:root nvda-remote-server_$VERSION
 chmod -R 755 nvda-remote-server_$VERSION
 chmod 644 nvda-remote-server_$VERSION/DEBIAN/control
 chmod 644 nvda-remote-server_$VERSION/DEBIAN/conffiles
diff --git a/debian/build.sh b/debian/build.sh
index e5fdfe1..a847fac 100644
--- a/debian/build.sh
+++ b/debian/build.sh
@@ -26,7 +26,7 @@ gzip -n -9 nvda-remote-server_$VERSION/usr/share/man/man5/NVDARemoteServer.conf.
 gzip -n -9 nvda-remote-server_$VERSION/usr/share/man/man1/NVDARemoteCertificate.1
 gzip -n -9 nvda-remote-server_$VERSION/usr/share/doc/nvda-remote-server/changelog.Debian
 #change permissions
-chown -R root.root nvda-remote-server_$VERSION
+chown -R root:root nvda-remote-server_$VERSION
 chmod -R 755 nvda-remote-server_$VERSION
 chmod 644 nvda-remote-server_$VERSION/DEBIAN/control
 chmod 644 nvda-remote-server_$VERSION/DEBIAN/conffiles
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 0921673..3636d9b 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,5 +1,5 @@
 #base image
-FROM ubuntu
+FROM debian
 #image metadata
 LABEL version="2.3" description="This image allows you to run NVDA Remote Server inside a docker container" org.opencontainers.image.authors="Jose Manuel Delicado"
 #prepare image
diff --git a/manual/NVDARemoteServer.conf.5 b/manual/NVDARemoteServer.conf.5
index 0e592bc..b47116d 100644
--- a/manual/NVDARemoteServer.conf.5
+++ b/manual/NVDARemoteServer.conf.5
@@ -103,7 +103,7 @@ The message of the day can be displayed once (only for first-time clients) or ea
 Example: motd_force_display=1
 .P
 includeTracebacks
-.p
+.P
 Tracebacks are helpful when debugging exceptions, but can be quite anoying on some scenarios, such as in production servers.
 .P
 You can control wether tracebacks are displayed in the log file or the console using this setting.