diff --git a/src/github-helper.ts b/src/github-helper.ts
index 6d41e06..766a5fd 100644
--- a/src/github-helper.ts
+++ b/src/github-helper.ts
@@ -47,7 +47,7 @@ export class GitHubHelper {
       options.auth = `${token}`
     }
     if (githubServerHostname !== 'github.com') {
-      options.baseUrl = `https://${githubServerHostname}/api/v3`
+      options.baseUrl = `https://${githubServerHostname}/api/v1`
     } else {
       options.baseUrl = 'https://api.github.com'
     }