diff --git a/roles/prometheus/templates/prometheus/alert.rules.yml.j2 b/roles/prometheus/templates/prometheus/alert.rules.yml.j2
index 2a10358..6df102f 100644
--- a/roles/prometheus/templates/prometheus/alert.rules.yml.j2
+++ b/roles/prometheus/templates/prometheus/alert.rules.yml.j2
@@ -22,7 +22,7 @@ groups:
     labels:
       severity: warning
     annotations:
-      summary: "Mémoire libre de {{ $labels.instance }} à {{ $value }}%."
+      summary: "Mémoire libre de {{ $labels.instance }} à {{ $value | printf "%.2f" }}%."
 
   # Alert for out of disk space
   - alert: OutOfDiskSpace
@@ -31,7 +31,7 @@ groups:
     labels:
       severity: warning
     annotations:
-      summary: "Espace libre de {{ $labels.mountpoint }} sur {{ $labels.instance }} à {{ $value }}%."
+      summary: "Espace libre de {{ $labels.mountpoint }} sur {{ $labels.instance }} à {{ $value | printf "%.2f" }}%."
 
   # Alert for out of inode space on disk
   - alert: OutOfInodes
@@ -49,7 +49,7 @@ groups:
     labels:
       severity: warning
     annotations:
-      summary: "CPU sur {{ $labels.instance }} à {{ $value }}%."
+      summary: "CPU sur {{ $labels.instance }} à {{ $value | printf "%.2f" }}%."
 
   # Check systemd unit (> buster)
   - alert: SystemdServiceFailed