diff --git a/lib/rules/validate-schema.js b/lib/rules/validate-schema.js
index e7a3942..bed7346 100644
--- a/lib/rules/validate-schema.js
+++ b/lib/rules/validate-schema.js
@@ -3,6 +3,8 @@
 const Ajv = require('ajv');
 const { default: betterAjvErrors } = require('better-ajv-errors');
 
+let ajv;
+
 module.exports = {
   meta: {
     docs: {
@@ -30,7 +32,9 @@ module.exports = {
 
     let sourceCode = context.getSourceCode();
 
-    let ajv = new Ajv();
+    if (!ajv) {
+      ajv = new Ajv();
+    }
 
     let schema = JSON.parse(options.schema);