diff --git a/window.py b/window.py
index 0f17fd1..857b63d 100644
--- a/window.py
+++ b/window.py
@@ -226,8 +226,8 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
 
 header = {
-    "User-Agent": "Api Test",
-    "Authorization": "Bearer "
+    "User-Agent": "",
+    "Authorization": ""
 }
 
 
@@ -243,11 +243,33 @@ class SearchDialog(QDialog, Ui_SearchDialog):
         self.parent = parent
 
         # import tokens from tokens.json
-        self.tokens = jsonIO.load_json("tokens.json")
-        header["Authorization"] += self.tokens["access_token"]
+        if not jsonIO.is_valid_json("tokens.json"):
+            jsonIO.save_json("tokens.json", {
+                "useragent": "",
+                "client_id": "",
+                "client_secret": "",
+                "authorization_code": "",
+                "access_token": "",
+                "refresh_token": ""
+            })
+            QMessageBox.critical(self, "Ошибка", "Заполните 'tokens.json' своими данными чтобы поиск работал корректно!")
+            self.close()
+        else:
+            self.tokens = jsonIO.load_json("tokens.json")
+        for key, value in self.tokens.items():
+            if (key != "access_token" or key != "refresh_token") and value == "":
+                QMessageBox.critical(self, "Ошибка", "Заполните 'tokens.json' своими данными чтобы поиск работал корректно!")
+                self.close()
+        if self.tokens["access_token"] == "":
+            self.get_new_access_token()
+        self.update_headers()
 
         self.ui.search.clicked.connect(self.search_titles)
 
+    def update_headers(self):
+        header["User-Agent"] = self.tokens["useragent"]
+        header["Authorization"] = "Bearer {}".format(self.tokens["access_token"])
+
     def get_new_access_token(self):
         response = post("https://shikimori.one/oauth/token", headers=header, data={
             "grant_type": "authorization_code",
@@ -260,9 +282,10 @@ class SearchDialog(QDialog, Ui_SearchDialog):
             self.tokens["access_token"] = new_tokens["access_token"]
             self.tokens["refresh_token"] = new_tokens["refresh_token"]
             jsonIO.save_json("tokens.json", self.tokens)
-            # print("got new tokens")
+            self.update_headers()
+            print("got new tokens")
 
-    def refresh_token(self):
+    def refresh_access_token(self):
         response = post("https://shikimori.one/oauth/token", headers=header, data={
             "grant_type": "refresh_token",
             "client_id": self.tokens["client_id"],
@@ -274,7 +297,7 @@ class SearchDialog(QDialog, Ui_SearchDialog):
             self.tokens["access_token"] = new_tokens["access_token"]
             self.tokens["refresh_token"] = new_tokens["refresh_token"]
             jsonIO.save_json("tokens.json", self.tokens)
-            header["Authorization"] = "Bearer " + new_tokens["access_token"]
+            self.update_headers()
             print("tokens updated", new_tokens)
 
     def search_titles(self):
@@ -286,7 +309,7 @@ class SearchDialog(QDialog, Ui_SearchDialog):
         # print(response.json())
         if response.status_code == 401:
             if response.json()["error"] == "invalid_token":
-                self.refresh_token()
+                self.refresh_access_token()
                 # self.search_titles()
                 return
         if response.status_code == 200: