diff --git a/changelog/83_UNRELEASED_xxxx-xx-xx.md b/changelog/83_UNRELEASED_xxxx-xx-xx.md
new file mode 100644
index 00000000..3edda32b
--- /dev/null
+++ b/changelog/83_UNRELEASED_xxxx-xx-xx.md
@@ -0,0 +1,57 @@
+> ⚠️ xxxBREAKING CHANGESxxx
+
+> ❗ xxxImportant upgrade informationXXX
+
+> 💡 xxxMinor upgrade informationXXX
+
+### New Feature: xxxx
+
+- xxx
+
+### Stock
+
+- xxx
+
+### Shopping list
+
+- xxx
+
+### Recipes
+
+- xxx
+
+### Meal plan
+
+- xxx
+
+### Chores
+
+- xxx
+
+### Calendar
+
+- Fixed that the iCal export was broken (any shared `https://<Grocy>/api/calendar/ical?secret=xxx`-link always returned `401 Unauthorized`)
+
+### Tasks
+
+- xxx
+
+### Batteries
+
+- xxx
+
+### Equipment
+
+- xxx
+
+### Userfields
+
+- xxx
+
+### General
+
+- xxx
+
+### API
+
+- xxx
diff --git a/middleware/Auth/ApiKeyAuthMiddleware.php b/middleware/Auth/ApiKeyAuthMiddleware.php
index e7e5abdb..5511bb21 100644
--- a/middleware/Auth/ApiKeyAuthMiddleware.php
+++ b/middleware/Auth/ApiKeyAuthMiddleware.php
@@ -40,7 +40,7 @@ class ApiKeyAuthMiddleware extends BaseAuthMiddleware
 		// Handling of special purpose API keys
 		if (!$validApiKey)
 		{
-			if ($this->RouteName === 'calendar-ical')
+			if ($this->GetRouteName($request) === 'calendar-ical')
 			{
 				if ($request->getQueryParam('secret') !== null && $apiKeyService->IsValidApiKey($request->getQueryParam('secret'), ApiKeyService::API_KEY_TYPE_SPECIAL_PURPOSE_CALENDAR_ICAL))
 				{
diff --git a/middleware/Auth/BaseAuthMiddleware.php b/middleware/Auth/BaseAuthMiddleware.php
index 619b062e..7e14b034 100644
--- a/middleware/Auth/BaseAuthMiddleware.php
+++ b/middleware/Auth/BaseAuthMiddleware.php
@@ -11,17 +11,10 @@ use Slim\Routing\RouteContext;
 
 abstract class BaseAuthMiddleware extends BaseMiddleware
 {
-	protected ?string $RouteName = null;
-	protected bool $IsApiRoute = false;
-
 	public function __invoke(Request $request, RequestHandler $handler): Response
 	{
-		$routeContext = RouteContext::fromRequest($request);
-		$route = $routeContext->getRoute();
-		$this->RouteName = $route->getName();
-		$this->IsApiRoute = string_starts_with($request->getUri()->getPath(), '/api/');
-
-		if ($this->RouteName === 'root' || $this->RouteName === 'login')
+		$routeName = $this->GetRouteName($request);
+		if ($routeName === 'root' || $routeName === 'login')
 		{
 			// Root and Login routes are public/unauthenticated
 
@@ -53,7 +46,7 @@ abstract class BaseAuthMiddleware extends BaseMiddleware
 				define('GROCY_AUTHENTICATED', false);
 				$response = $this->ResponseFactory->createResponse();
 
-				if ($this->IsApiRoute)
+				if ($this->IsApiRoute($request))
 				{
 					return $response->withStatus(401);
 				}
@@ -69,7 +62,7 @@ abstract class BaseAuthMiddleware extends BaseMiddleware
 				define('GROCY_USER_USERNAME', $user->username);
 				define('GROCY_USER_PICTURE_FILE_NAME', $user->picture_file_name);
 
-				return $response = $handler->handle($request);
+				return $handler->handle($request);
 			}
 		}
 	}
@@ -122,6 +115,16 @@ abstract class BaseAuthMiddleware extends BaseMiddleware
 		}
 	}
 
+	protected function GetRouteName(Request $request): ?string
+	{
+		return RouteContext::fromRequest($request)->getRoute()?->getName();
+	}
+
+	protected function IsApiRoute(Request $request): bool
+	{
+		return string_starts_with($request->getUri()->getPath(), '/api/');
+	}
+
 	/**
 	 * @param array $postParams
 	 * @return bool True/False if the provided credentials were valid
diff --git a/middleware/Auth/DefaultAuthMiddleware.php b/middleware/Auth/DefaultAuthMiddleware.php
index a5c2bffc..fc64b028 100644
--- a/middleware/Auth/DefaultAuthMiddleware.php
+++ b/middleware/Auth/DefaultAuthMiddleware.php
@@ -10,7 +10,7 @@ class DefaultAuthMiddleware extends BaseAuthMiddleware
 {
 	protected function AuthenticateRequest(Request $request)
 	{
-		if ($this->IsApiRoute)
+		if ($this->IsApiRoute($request))
 		{
 			// Session cookie or API Key is ok
 			$auth = new SessionAuthMiddleware($this->AppContainer, $this->ResponseFactory);
diff --git a/middleware/Auth/ReverseProxyAuthMiddleware.php b/middleware/Auth/ReverseProxyAuthMiddleware.php
index 2fc5ad07..e9233cb6 100644
--- a/middleware/Auth/ReverseProxyAuthMiddleware.php
+++ b/middleware/Auth/ReverseProxyAuthMiddleware.php
@@ -13,7 +13,7 @@ class ReverseProxyAuthMiddleware extends BaseAuthMiddleware
 		define('GROCY_EXTERNALLY_MANAGED_AUTHENTICATION', true);
 
 		// Try to use regular API Key authentication (applies when the reverse proxy is configured to be bypassed for API routes)
-		if ($this->IsApiRoute)
+		if ($this->IsApiRoute($request))
 		{
 			$auth = new ApiKeyAuthMiddleware($this->AppContainer, $this->ResponseFactory);
 			$user = $auth->AuthenticateRequest($request);