diff --git a/action.yml b/action.yml
index fa4c08b..49e8b94 100644
--- a/action.yml
+++ b/action.yml
@@ -67,6 +67,10 @@ inputs:
     description: 'Base url of GitHub API'
     required: false
     default: ${{ github.api_url }}
+  GITHUB_SERVER_URL:
+    description: 'Base URL of GitHub web interface'
+    required: false
+    default: ${{ github.server_url }}
   ESCAPE:
     description: 'Escape all special Markdown characters'
     required: false
diff --git a/main.py b/main.py
index 049dc57..71d950c 100644
--- a/main.py
+++ b/main.py
@@ -8,11 +8,6 @@ from io import StringIO
 import itertools
 import operator
 from collections import defaultdict
-from TodoParser import TodoParser
-from LineStatus import LineStatus
-from Client import Client
-from LocalClient import LocalClient
-from GitHubClient import GitHubClient
 
 
 if __name__ == "__main__":