diff --git a/github_run.py b/github_run.py
index 008f728..98adcbc 100644
--- a/github_run.py
+++ b/github_run.py
@@ -25,7 +25,7 @@ def comment(self, comment_text):
         # to avoid destroying links.
         # by accident.
         comment_text = re.sub(
-            r"([^a-zA-Z0-9_/])((?:[@][\w-]+)(?:[@][\w.-]+)?)",
+            r"([^a-zA-Z0-9_/])((?:[@][\w-]+)(?:[@.][\w.-]+)?)",
             lambda m: f"{m.group(1)}`{m.group(2)}`",
             comment_text
         )