diff --git a/apiserver/apiserver/api/serializers.py b/apiserver/apiserver/api/serializers.py
index a796e88..1244768 100644
--- a/apiserver/apiserver/api/serializers.py
+++ b/apiserver/apiserver/api/serializers.py
@@ -504,6 +504,7 @@ class UserSerializer(serializers.ModelSerializer):
     transactions = serializers.SerializerMethodField()
     door_code = serializers.SerializerMethodField()
     wifi_pass = serializers.SerializerMethodField()
+    app_version = serializers.SerializerMethodField()
 
     class Meta:
         model = User
@@ -517,6 +518,7 @@ class UserSerializer(serializers.ModelSerializer):
             'is_staff',
             'door_code',
             'wifi_pass',
+            'app_version',
             #'usages',
         ]
         depth = 1
@@ -541,6 +543,9 @@ class UserSerializer(serializers.ModelSerializer):
         else:
             return None
 
+    def get_app_version(self, obj):
+        return settings.APP_VERSION
+
 
 class MyRegisterSerializer(RegisterSerializer):
     first_name = serializers.CharField(max_length=32)
diff --git a/apiserver/apiserver/settings.py b/apiserver/apiserver/settings.py
index 167660b..d8f2cfc 100644
--- a/apiserver/apiserver/settings.py
+++ b/apiserver/apiserver/settings.py
@@ -282,5 +282,7 @@ DEFAULT_FROM_EMAIL = 'Protospace Portal <portal@mg.protospace.ca>'
 if DEBUG: logger.info('Debug mode ON')
 logger.info('Test logging for each thread')
 
+APP_VERSION = 1  # TODO: automate this
+
 #import logging_tree
 #logging_tree.printout()
diff --git a/webclient/src/App.js b/webclient/src/App.js
index 644beb2..8daf355 100644
--- a/webclient/src/App.js
+++ b/webclient/src/App.js
@@ -27,6 +27,8 @@ import { PasswordReset, ConfirmReset } from './PasswordReset.js';
 import { NotFound, PleaseLogin } from './Misc.js';
 import { Footer } from './Footer.js';
 
+const APP_VERSION = 1;  // TODO: automate this
+
 function App() {
 	const [token, setToken] = useState(localStorage.getItem('token', ''));
 	const [user, setUser] = useState(JSON.parse(localStorage.getItem('user', 'false')));
@@ -98,6 +100,11 @@ function App() {
 		darkmode.showWidget();
 	}, []);
 
+	if (user && user?.app_version !== APP_VERSION) {
+		setUserCache(false);
+		window.location.reload();
+	}
+
 	return (
 		<div>
 			<ManageScroll />