diff --git a/example/python/tdjson_example.py b/example/python/tdjson_example.py
index 884ab547..ac034800 100644
--- a/example/python/tdjson_example.py
+++ b/example/python/tdjson_example.py
@@ -112,7 +112,7 @@ while True:
 
             # set an encryption key for database to let know TDLib how to open the database
             if auth_state['@type'] == 'authorizationStateWaitEncryptionKey':
-                td_send({'@type': 'checkDatabaseEncryptionKey', 'key': 'my_key'})
+                td_send({'@type': 'checkDatabaseEncryptionKey', 'encryption_key': ''})
 
             # enter phone number to log in
             if auth_state['@type'] == 'authorizationStateWaitPhoneNumber':
diff --git a/example/swift/src/main.swift b/example/swift/src/main.swift
index 6060981b..06eaa9ce 100644
--- a/example/swift/src/main.swift
+++ b/example/swift/src/main.swift
@@ -124,7 +124,7 @@ func updateAuthorizationState(authorizationState: Dictionary<String, Any>) {
             ]);
 
         case "authorizationStateWaitEncryptionKey":
-            client.queryAsync(query: ["@type":"checkDatabaseEncryptionKey", "key":"cucumber"])
+            client.queryAsync(query: ["@type":"checkDatabaseEncryptionKey", "encryption_key":""])
 
         case "authorizationStateWaitPhoneNumber":
             print("Enter your phone number: ")