diff --git a/WebAPI/Controllers/LayersController.cs b/WebAPI/Controllers/LayersController.cs
index b6d4a01..9595fbf 100644
--- a/WebAPI/Controllers/LayersController.cs
+++ b/WebAPI/Controllers/LayersController.cs
@@ -189,6 +189,7 @@ namespace WebAPI.Controllers
                         {
                             MorskaImporter importer = new MorskaImporter(db, googleSheetValues, this);
                             importer.import(importWorker);
+                            Thread.Sleep(5000); // be aware of GSheet API quota
 
                             logsController.AddEntry(new LogEntry
                             {
@@ -203,7 +204,8 @@ namespace WebAPI.Controllers
                         {
                             MorskaImporter importer = new MorskaImporter(db, googleSheetValues, this);
                             importer.import(importWorker);
-
+                            Thread.Sleep(5000); // be aware of GSheet API quota
+                            
                             logsController.AddEntry(new LogEntry
                             {
                                 Title = $"{importWorker!.Name}, {importWorker.Id}",