diff --git a/src/apexcharts-card.ts b/src/apexcharts-card.ts
index ecbd14f..c4b2e5c 100644
--- a/src/apexcharts-card.ts
+++ b/src/apexcharts-card.ts
@@ -50,14 +50,13 @@ localForage.config({
 localForage
   .iterate((data, key) => {
     const value: EntityEntryCache = key.endsWith('-raw') ? data : decompress(data);
+    if (value.card_version !== pjson.version) {
+      localForage.removeItem(key);
+    }
     const start = new Date();
-    if (value.span === undefined) {
+    start.setTime(start.getTime() - value.span);
+    if (new Date(value.last_fetched) < start) {
       localForage.removeItem(key);
-    } else {
-      start.setTime(start.getTime() - value.span);
-      if (new Date(value.last_fetched) < start) {
-        localForage.removeItem(key);
-      }
     }
   })
   .catch((err) => {
diff --git a/src/graphEntry.ts b/src/graphEntry.ts
index fdc8151..87f29e9 100644
--- a/src/graphEntry.ts
+++ b/src/graphEntry.ts
@@ -8,6 +8,7 @@ import { HOUR_24, moment } from './const';
 import parse from 'parse-duration';
 import SparkMD5 from 'spark-md5';
 import { ChartCardSpanExtConfig } from './types-config';
+import * as pjson from '../package.json';
 
 export default class GraphEntry {
   private _history?: EntityEntryCache;
@@ -171,12 +172,14 @@ export default class GraphEntry {
       if (history?.data.length) {
         history.span = this._graphSpan;
         history.last_fetched = new Date();
+        history.card_version = pjson.version;
         if (history.data.length !== 0) {
           history.data.push(...newStateHistory);
         }
       } else {
         history = {
           span: this._graphSpan,
+          card_version: pjson.version,
           last_fetched: new Date(),
           data: newStateHistory,
         };
diff --git a/src/types.ts b/src/types.ts
index bbb1f59..57b15da 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -20,6 +20,7 @@ export interface ChartCardSeriesConfig extends ChartCardSeriesExternalConfig {
 
 export interface EntityEntryCache {
   span: number;
+  card_version: string;
   last_fetched: Date;
   data: EntityCachePoints;
 }