diff --git a/gh-starred-to-opml.sh b/gh-starred-to-opml.sh
index 9dc036f..79bbe72 100644
--- a/gh-starred-to-opml.sh
+++ b/gh-starred-to-opml.sh
@@ -63,9 +63,9 @@ fi
 
 if [[ -z $_FILENAME ]]; then
   if [[ -z $_LISTNAME ]]; then
-    _FILENAME="gh_starred_${_USERNAME}.opml"
+    _FILENAME="gh_starred_${_USERNAME}_$(date '+%y%m%d%H%M').opml"
   else
-    _FILENAME="gh_starred_${_USERNAME}_${_LISTNAME}.opml"
+    _FILENAME="gh_starred_${_USERNAME}_${_LISTNAME}_$(date '+%y%m%d%H%M').opml"
   fi
 fi