diff --git a/torn-attribute-tracker.user.js b/torn-attribute-tracker.user.js
index 7c85848..fcf3616 100644
--- a/torn-attribute-tracker.user.js
+++ b/torn-attribute-tracker.user.js
@@ -37,7 +37,7 @@
 
   function pruneHistory(entries, now) {
     const cutoff = (now || Date.now()) - THIRTY_DAYS_MS;
-    return entries.filter((e) => e.ts >= cutoff);
+    return entries.filter((e) => e.ts > cutoff);
   }
 
   function computeEstimate(current, target, perTrain, perDay) {