diff --git a/script/sql/create/23.options.sql b/script/sql/create/23.options.sql
index d973e6d..f88b536 100644
--- a/script/sql/create/23.options.sql
+++ b/script/sql/create/23.options.sql
@@ -4,7 +4,7 @@
 
 create table options
 (
-  key   text not null
+  key   text primary key
 , value text not null
 );