diff --git a/docs/generate.py b/docs/generate.py
old mode 100644
new mode 100755
index df91379d..14708b74
--- a/docs/generate.py
+++ b/docs/generate.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import os
 import re
 import sys
diff --git a/run_tests.py b/run_tests.py
old mode 100644
new mode 100755
index 3fa12aff..3a3ab0da
--- a/run_tests.py
+++ b/run_tests.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import unittest
 
 if __name__ == '__main__':
diff --git a/telethon/crypto/auth_key.py b/telethon/crypto/auth_key.py
old mode 100755
new mode 100644
diff --git a/telethon/crypto/factorizator.py b/telethon/crypto/factorizator.py
old mode 100755
new mode 100644
diff --git a/telethon/crypto/rsa.py b/telethon/crypto/rsa.py
old mode 100755
new mode 100644
diff --git a/telethon/helpers.py b/telethon/helpers.py
old mode 100755
new mode 100644
diff --git a/telethon/network/__init__.py b/telethon/network/__init__.py
old mode 100755
new mode 100644
diff --git a/telethon/network/authenticator.py b/telethon/network/authenticator.py
old mode 100755
new mode 100644
diff --git a/telethon/network/mtproto_plain_sender.py b/telethon/network/mtproto_plain_sender.py
old mode 100755
new mode 100644
diff --git a/telethon/network/tcp_client.py b/telethon/network/tcp_client.py
old mode 100755
new mode 100644
diff --git a/telethon/network/tcp_transport.py b/telethon/network/tcp_transport.py
old mode 100755
new mode 100644
diff --git a/telethon/telegram_client.py b/telethon/telegram_client.py
index d0e44a30..232bf79a 100644
--- a/telethon/telegram_client.py
+++ b/telethon/telegram_client.py
@@ -1,5 +1,5 @@
 import platform
-from datetime import datetime, timedelta
+from datetime import timedelta
 from hashlib import md5
 from mimetypes import guess_type
 from os import listdir, path
@@ -518,7 +518,7 @@ class TelegramClient:
             entity)
 
     def send_media_file(self, input_media, entity):
-        """Sends any input_media (contact, document, photo...) to the given entiy"""
+        """Sends any input_media (contact, document, photo...) to the given entity"""
         self.invoke(
             SendMediaRequest(
                 peer=get_input_peer(entity),
@@ -741,6 +741,6 @@ class TelegramClient:
         self.sender.remove_update_handler(handler)
 
     def list_update_handlers(self):
-        return [ handler.__name__ for handler in self.sender.on_update_handlers ]
+        return [handler.__name__ for handler in self.sender.on_update_handlers]
 
     # endregion
diff --git a/telethon/tl/__init__.py b/telethon/tl/__init__.py
old mode 100755
new mode 100644
diff --git a/telethon/tl/mtproto_request.py b/telethon/tl/mtproto_request.py
old mode 100755
new mode 100644
diff --git a/telethon/tl/session.py b/telethon/tl/session.py
old mode 100755
new mode 100644
diff --git a/telethon/utils/__init__.py b/telethon/utils/__init__.py
old mode 100755
new mode 100644
diff --git a/telethon/utils/binary_reader.py b/telethon/utils/binary_reader.py
old mode 100755
new mode 100644
diff --git a/telethon/utils/binary_writer.py b/telethon/utils/binary_writer.py
old mode 100755
new mode 100644
diff --git a/telethon_generator/parser/__init__.py b/telethon_generator/parser/__init__.py
old mode 100755
new mode 100644
diff --git a/telethon_generator/parser/source_builder.py b/telethon_generator/parser/source_builder.py
old mode 100755
new mode 100644
diff --git a/telethon_generator/parser/tl_object.py b/telethon_generator/parser/tl_object.py
old mode 100755
new mode 100644
diff --git a/telethon_generator/parser/tl_parser.py b/telethon_generator/parser/tl_parser.py
old mode 100755
new mode 100644
diff --git a/telethon_generator/tl_generator.py b/telethon_generator/tl_generator.py
index 80975702..8a4a99f5 100755
--- a/telethon_generator/tl_generator.py
+++ b/telethon_generator/tl_generator.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import os
 import re
 import shutil
diff --git a/try_telethon.py b/try_telethon.py
old mode 100644
new mode 100755
index 7b8cdee0..a2dcff3d
--- a/try_telethon.py
+++ b/try_telethon.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import traceback
 
 from telethon.interactive_telegram_client import (InteractiveTelegramClient,