diff --git a/app.php b/app.php
index c2a16c8..c23680a 100644
--- a/app.php
+++ b/app.php
@@ -119,9 +119,8 @@ $f3->route('GET /signature',
 
         if ($f3->exists('signature')) {
             $retentions = [];
-            foreach ($f3->get('signature.retention') ?? [] as $retention) {
-                $r = explode(':', $retention);
-                $retentions[$r[0]] = $r[1];
+            foreach ($f3->get('signature.retention') ?? [] as $key => $text) {
+                $retentions[$key] = $text;
             }
             $f3->set('signatureRetention', $retentions);
         }
diff --git a/config/config.ini.example b/config/config.ini.example
index 8ab3bca..a1a6aa1 100644
--- a/config/config.ini.example
+++ b/config/config.ini.example
@@ -36,9 +36,9 @@ PDF_STORAGE_PATH=/path/to/folder
 ; Enable custom retention period for shared PDF
 ; This override the default retention periods
 ; Warning: Text on the right of the colon will be translated according to the .po files
-;retention.0="+1 year:for one year"
-;retention.1="+6 months:for six months"
-;retention.2="+1 month:for one month"
-;retention.3="+1 week:for one week"
-;retention.4="+1 day:for one day"
-;retention.5="+1 hour:for one hour"
+;retention[+1 year]="for one year"
+;retention[+6 months]="for six months"
+;retention[+1 month]="for one month"
+;retention[+1 week]="for one week"
+;retention[+1 day]="for one day"
+;retention[+1 hour]="for one hour"