diff --git a/template_automation/github_client.py b/template_automation/github_client.py
index 59c3dc7..dc34d36 100644
--- a/template_automation/github_client.py
+++ b/template_automation/github_client.py
@@ -518,6 +518,12 @@ def update_repository_topics(self, repo_name: str, topics: List[str]) -> None:
         
         Args:
             repo_name: Name of the repository
+            topics: List of topics to set
+        """
+        # GitHub API requires a special media type for repository topics
+        headers = {"Accept": "application/vnd.github.mercy-preview+json"}
+        url = f"/api/v3/repos/{self.org_name}/{repo_name}/topics"
+        
         self._request("PUT", url, json={"names": topics}, headers=headers)
         
         logger.info(f"Updated topics for {repo_name}: {topics}")