diff --git a/dist/index.js b/dist/index.js
index ce53ef1..6caa857 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -654,11 +654,7 @@ class GitAuthHelper {
         });
     }
     getServerUrl() {
-        // todo: remove GITHUB_URL after support for GHES Alpha is no longer needed
-        // See https://github.com/actions/checkout/blob/main/src/url-helper.ts#L22-L29
-        return new url_1.URL(process.env['GITHUB_SERVER_URL'] ||
-            process.env['GITHUB_URL'] ||
-            'https://github.com');
+        return new url_1.URL(process.env['GITHUB_SERVER_URL'] || 'https://github.com');
     }
 }
 exports.GitAuthHelper = GitAuthHelper;
diff --git a/src/git-auth-helper.ts b/src/git-auth-helper.ts
index 80fc5f3..1b6c375 100644
--- a/src/git-auth-helper.ts
+++ b/src/git-auth-helper.ts
@@ -146,12 +146,6 @@ export class GitAuthHelper {
   }
 
   private getServerUrl(): URL {
-    // todo: remove GITHUB_URL after support for GHES Alpha is no longer needed
-    // See https://github.com/actions/checkout/blob/main/src/url-helper.ts#L22-L29
-    return new URL(
-      process.env['GITHUB_SERVER_URL'] ||
-        process.env['GITHUB_URL'] ||
-        'https://github.com'
-    )
+    return new URL(process.env['GITHUB_SERVER_URL'] || 'https://github.com')
   }
 }