diff --git a/_github b/_github
index e01fcd8..8b2e3a3 100644
--- a/_github
+++ b/_github
@@ -75,8 +75,10 @@ _github() {
           && ret=0
         ;;
         (config)
-          # TODO Not implemented
-          _message "${words[1]} command argument" && ret=0
+          _arguments \
+            '1: :_github_users' \
+            '2: :_github_repos' \
+          && ret=0
         ;;
         (create)
           # TODO Not implemented