diff --git a/_data/rules.yml b/_data/rules.yml
index 513a24c..7589e43 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -1281,7 +1281,7 @@ groups:
                 severity: critical
               - name: HAProxy backend max active session
                 description: HAproxy backend {{ $labels.fqdn }}/{{ $labels.backend }} is reaching session limit (> 80%).
-                query: avg_over_time(((sum by (proxy) (haproxy_server_max_sessions)) / (sum by (proxy) (haproxy_server_limit_sessions))) [2m]) * 100 > 80
+                query: avg_over_time(((sum by (proxy) (haproxy_server_max_sessions)) / (sum by (proxy) (haproxy_server_limit_sessions))) [2m:]) * 100 > 80
                 severity: warning
                 for: 2m
               - name: HAProxy pending requests