diff --git a/app/scripts/views/open-view.js b/app/scripts/views/open-view.js
index fa08bf9c..63fe6130 100644
--- a/app/scripts/views/open-view.js
+++ b/app/scripts/views/open-view.js
@@ -3,6 +3,7 @@
 const Backbone = require('backbone');
 const kdbxweb = require('kdbxweb');
 const OpenConfigView = require('./open-config-view');
+const AppSettingsModel = require('../models/app-settings-model');
 const Keys = require('../const/keys');
 const Alerts = require('../comp/alerts');
 const SecureInput = require('../comp/secure-input');
@@ -93,6 +94,21 @@ const OpenView = Backbone.View.extend({
         });
         this.inputEl = this.$el.find('.open__pass-input');
         this.passwordInput.setElement(this.inputEl);
+
+        if (!this.versionWarningShown) {
+            // TODO: remove in v1.5
+            this.versionWarningShown = AppSettingsModel.instance.get('versionWarningShown');
+            if (!this.versionWarningShown) {
+                AppSettingsModel.instance.set('versionWarningShown', true);
+                this.versionWarningShown = true;
+                if (this.model.fileInfos.length) {
+                    Alerts.info({
+                        header: 'KeeWeb updated',
+                        body: 'There was a major update of KeeWeb. Please make sure you have a backup of your password files!'
+                    });
+                }
+            }
+        }
         return this;
     },