diff --git a/src/types/Profession.ts b/src/types/Profession.ts
index be9f1d66..84a0ccff 100644
--- a/src/types/Profession.ts
+++ b/src/types/Profession.ts
@@ -747,6 +747,11 @@ const SkillsOptions = DB.TypeAlias(import.meta.url, {
         comment: "The AP value you can buy skills for.",
         type: DB.Integer({ minimum: 1 }),
       }),
+      maximum: DB.Optional({
+        comment:
+          "If specified, you can only improve a single skill to that maximum with the provided AP value.",
+        type: DB.Integer({ minimum: 1 }),
+      }),
     }),
   customConstraints: ({ instanceContent, getInstanceById }) =>
     [