diff --git a/kv-secret-scan.sh b/kv-secret-scan.sh
index 09198ca..e1b8233 100755
--- a/kv-secret-scan.sh
+++ b/kv-secret-scan.sh
@@ -2,8 +2,8 @@
 set -e
 
 TZ=Europe/London
-TODAY=$(date -Idate)
-DATE_90=$(date -Iseconds -v+90d)
+TODAY=$(gdate -Idate)
+DATE_90=$(gdate --date="90 days ago" +"%Y-%m-%d")
 SILENT=0
 
 NOTIFY=1