diff --git a/.travis.yml b/.travis.yml
index 8e87fcf6..64c7c5d7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,7 @@ install:
   - cpanm --notest Graphics::ColorObject
   - cpanm --notest IPC::Run3
   - cpanm --notest IPC::ShareLite
+  - cpanm --notest JSON
   - cpanm --notest JSON::Any
   - cpanm --notest Mail::Sendmail
   - cpanm --notest Modern::Perl
diff --git a/plugins/mysql/mysql_slave b/plugins/mysql/mysql_slave
index 5541a44a..e4cef7e3 100755
--- a/plugins/mysql/mysql_slave
+++ b/plugins/mysql/mysql_slave
@@ -46,6 +46,8 @@ use strict;
 my $MYSQLADMIN = $ENV{mysqladmin} || "mysql";
 my $MYSQLOPTS = $ENV{mysqlopts} || "";
 my $COMMAND = "$MYSQLADMIN $MYSQLOPTS -e 'show slave status\\G' | grep 'Seconds_Behind_Master'";
+my $WARNING = $ENV{mysql_slave_warning} || "60";
+my $CRITICAL = $ENV{mysql_slave_warning} || "600";
 
 my $arg = shift();
 
@@ -81,6 +83,8 @@ sub print_config {
   print "seconds.label Seconds behind master\n";
   print "seconds.min 0\n";
   print "seconds.draw LINE2\n";
+  print "seconds.warning $WARNING\n";
+  print "seconds.critical $CRITICAL\n";
   print "graph_info Plugin available at <a href='http://oss.hjksolutions.com/munin/'>http://oss.hjksolutions.com/munin/</a>\n";
 
 }