diff --git a/script/ghco b/script/ghco
index a57ac1f..6e17121 100755
--- a/script/ghco
+++ b/script/ghco
@@ -5,7 +5,16 @@ set -e
 
 export GH_NO_UPDATE_NOTIFIER=1
 
-prid=$(gh pr list --limit 100 | fzf | awk '{print $1}')
+if [ "$1" = '-a' ]; then
+  cmd='gh pr list --limit 100' 
+elif [ -z "$GITHUB_USERNAME" ]; then
+  echo 'set $GITHUB_USERNAME first'
+  exit 1
+else
+  cmd="gh pr list --author $GITHUB_USERNAME" 
+fi
+
+prid=$(eval "$cmd" | fzf | awk '{print $1}')
 if [ -z $prid ]; then
   exit 0
 fi