diff --git a/Makefile b/Makefile
index c1bbb4f..7775500 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ INSTALL = install -p
 INSTALL_PROGRAM = $(INSTALL) -m755
 INSTALL_DATA = $(INSTALL) -m644
 INSTALL_DIR = $(INSTALL) -d
-INSTALL_WORLDDIR = $(INSTALL) -dm777
+INSTALL_WORLDDIR = $(INSTALL) -dm755
 
 Q = @
 
diff --git a/docs/monitorix.spec b/docs/monitorix.spec
index 9871c3e..4298a7f 100644
--- a/docs/monitorix.spec
+++ b/docs/monitorix.spec
@@ -85,7 +85,7 @@ rm -rf %{buildroot}
 %{_localstatedir}/lib/monitorix/www/logo_bot.png
 %{_localstatedir}/lib/monitorix/www/monitorixico.png
 %{_localstatedir}/lib/monitorix/www/cgi/monitorix.cgi
-%attr(777,root,root) %{_localstatedir}/lib/monitorix/www/imgs
+%attr(755,root,root) %{_localstatedir}/lib/monitorix/www/imgs
 %attr(755,root,root) %{_localstatedir}/lib/monitorix/usage
 %{_localstatedir}/lib/monitorix/reports/*.html
 %doc %{_mandir}/man5/monitorix.conf.5.gz
diff --git a/monitorix b/monitorix
index 46f60a6..6dd231c 100755
--- a/monitorix
+++ b/monitorix
@@ -2,7 +2,7 @@
 #
 # Monitorix - A lightweight system monitoring tool.
 #
-# Copyright (C) 2005-2017 by Jordi Sanfeliu <jordi@fibranet.cat>
+# Copyright (C) 2005-2018 by Jordi Sanfeliu <jordi@fibranet.cat>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -670,6 +670,12 @@ create_index();
 
 # start the HTTP built-in (if enabled)
 if(lc($config{httpd_builtin}->{enabled}) eq "y") {
+	logger("Setting owner/group and permission bits for the imgs/ directory.") if defined($options{d});
+	my (undef, undef, $uid) = getpwnam($config{httpd_builtin}->{user});
+	my (undef, undef, $gid) = getgrnam($config{httpd_builtin}->{group});
+	chown($uid, $gid, $config{base_dir} . "/" . $config{imgs_dir});
+	chmod(0755, $config{base_dir} . "/" . $config{imgs_dir});
+
 	require HTTPServer;
 	httpd_setup(\%config, $options{d});
 	logger("Started built-in HTTP server (pid $config{httpd_pid}).") if (defined($config{httpd_pid}));