diff --git a/playbooks/tasks/web/nagios.yml b/playbooks/tasks/web/nagios.yml
index 824578e..aa71c21 100644
--- a/playbooks/tasks/web/nagios.yml
+++ b/playbooks/tasks/web/nagios.yml
@@ -64,7 +64,7 @@
         command: "check_by_ssh!/usr/lib/nagios/plugins/check_pgsql -H localhost -l nagios -p {{ secret_postgresql_monitoring_password }} -w 2 -c 5"
         hostgroup: nagios-checkpgsql
       - name: PSQL Connections
-        command: "check_by_ssh!/usr/lib/nagios/plugins/check_pgsql -H localhost -l nagios -p {{ secret_postgresql_monitoring_password }} -w 2 -c 5 -q 'select (select count(*)::float used from pg_stat_activity) / (select setting::int max_conn from pg_settings where name=$$max_connections$$);' -W 0.5-0.7 -C 0.7-1.0"
+        command: "check_by_ssh!/usr/lib/nagios/plugins/check_pgsql -H localhost -l nagios -p {{ secret_postgresql_monitoring_password }} -w 2 -c 5 -q 'select (select count(*)::float used from pg_stat_activity) / (select setting::int max_conn from pg_settings where name=\\$\\$max_connections\\$\\$)' -W 0.5-0.7 -C 0.7-1.0"
         hostgroup: nagios-checkpgsql
       - name: Unit postgresql.service
         command: check_by_ssh!/usr/local/bin/monitoring-scripts/check_systemd_unit postgresql.service