diff --git a/src/common/config-parser.ts b/src/common/config-parser.ts
index b0fcb31..258fa2a 100644
--- a/src/common/config-parser.ts
+++ b/src/common/config-parser.ts
@@ -19,7 +19,7 @@ export async function readConfigFile(configFile: string): Promise<ConfigFile | u
       yup.object().shape({
         name: yup.string().required(),
         active: yup.boolean().required(),
-        priority: yup.number().required(),
+        priority: yup.number(),
         property: yup.object().shape({
           name: yup.string(),
           value: yup.mixed(),
diff --git a/src/common/types.ts b/src/common/types.ts
index e0b88c9..d1a042c 100644
--- a/src/common/types.ts
+++ b/src/common/types.ts
@@ -29,8 +29,6 @@ export abstract class RuleClass {
       case 3:
         this.level = 'note';
         break;
-      default:
-        this.level = 'warning';
     }
   }