diff --git a/server/routes.go b/server/routes.go
index 7e8f664b9..593d372e5 100644
--- a/server/routes.go
+++ b/server/routes.go
@@ -1071,11 +1071,13 @@ func isLocalIP(ip netip.Addr) bool {
 }
 
 func allowedHost(host string) bool {
+	host = strings.ToLower(host)
+
 	if host == "" || host == "localhost" {
 		return true
 	}
 
-	if hostname, err := os.Hostname(); err == nil && host == hostname {
+	if hostname, err := os.Hostname(); err == nil && host == strings.ToLower(hostname) {
 		return true
 	}