diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 53c175220..5c223ea12 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -6,7 +6,7 @@
     {
       "label": "watch typescript",
       "type": "shell",
-      "command": "yarn run watch",
+      "command": "npm run watch",
       "presentation": {
         "reveal": "never"
       },
diff --git a/l10n/bundle.l10n.de.json b/l10n/bundle.l10n.de.json
index 4244abdd1..fbf73d332 100644
--- a/l10n/bundle.l10n.de.json
+++ b/l10n/bundle.l10n.de.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "Probleme beim Laden der Referenz '{0}': {1}",
   "json.schema.nocontent": "Schema konnte nicht von '{0}' geladen werden: Kein Inhalt.",
   "json.schema.invalidFormat": "Inhalt von '{0}' konnte nicht analysiert werden: Analysefehler in Zeile:{1}, Spalte:{2}",
+  "json.schema.invalidSchema": "Schema '{0}' ist ungültig: {1}",
   "colorHexFormatWarning": "Ungültiges Farbformat. Verwenden Sie #RGB, #RGBA, #RRGGBB oder #RRGGBBAA.",
   "dateTimeFormatWarning": "Zeichenfolge ist kein RFC3339-Datum-Zeit-Wert.",
   "dateFormatWarning": "Zeichenfolge ist kein RFC3339-Datum.",
diff --git a/l10n/bundle.l10n.fr.json b/l10n/bundle.l10n.fr.json
index b34781920..7636639c7 100644
--- a/l10n/bundle.l10n.fr.json
+++ b/l10n/bundle.l10n.fr.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "Problèmes de chargement de la référence '{0}' : {1}",
   "json.schema.noContent": "Impossible de charger le schéma à partir de {0}: aucun contenu.",
   "json.schema.invalidFormat": "Impossible d’analyser le contenu de {0}: erreur d’analyse à la ligne:{1}, colonne:{2}",
+  "json.schema.invalidSchema": "Le schéma '{0}' n’est pas valide: {1}",
   "colorHexFormatWarning": "Format de couleur non valide. Utilisez #RGB, #RGBA, #RRGGBB ou #RRGGBBAA.",
   "dateTimeFormatWarning": "La chaîne n'est pas une date-heure RFC3339.",
   "dateFormatWarning": "La chaîne n'est pas une date RFC3339.",
diff --git a/l10n/bundle.l10n.ja.json b/l10n/bundle.l10n.ja.json
index 69ef7bc79..943da607d 100644
--- a/l10n/bundle.l10n.ja.json
+++ b/l10n/bundle.l10n.ja.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "参照 '{0}' の読み込み中に問題が発生しました: {1}",
   "json.schema.nocontent": "'{0}' からスキーマを読み込めませんでした: コンテンツがありません。",
   "json.schema.invalidFormat": "'{0}' の内容を解析できませんでした: 行 {1}、列 {2} で解析エラーが発生しました",
+  "json.schema.invalidSchema": "スキーマ '{0}' は無効です: {1}",
   "colorHexFormatWarning": "無効なカラー形式です。#RGB、#RGBA、#RRGGBB、または #RRGGBBAA を使用してください。",
   "dateTimeFormatWarning": "文字列は RFC3339 の日付と時刻形式ではありません。",
   "dateFormatWarning": "文字列は RFC3339 の日付形式ではありません。",
diff --git a/l10n/bundle.l10n.json b/l10n/bundle.l10n.json
index c33936f61..f81f6e796 100644
--- a/l10n/bundle.l10n.json
+++ b/l10n/bundle.l10n.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "Problems loading reference '{0}': {1}",
   "json.schema.noContent": "Unable to load schema from '{0}': No content.",
   "json.schema.invalidFormat": "Unable to parse content from '{0}': Parse error at line: {1} column: {2}",
+  "json.schema.invalidSchema": "Schema '{0}' is not valid: {1}",
   "colorHexFormatWarning": "Invalid color format. Use #RGB, #RGBA, #RRGGBB or #RRGGBBAA.",
   "dateTimeFormatWarning": "String is not a RFC3339 date-time.",
   "dateFormatWarning": "String is not a RFC3339 date.",
diff --git a/l10n/bundle.l10n.ko.json b/l10n/bundle.l10n.ko.json
index cfaf4197a..4d1180aeb 100644
--- a/l10n/bundle.l10n.ko.json
+++ b/l10n/bundle.l10n.ko.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "'{0}' 참조를 불러오는 데 문제가 발생했습니다: {1}",
   "json.schema.nocontent": "'{0}'에서 스키마를 불러올 수 없습니다: 내용이 없습니다.",
   "json.schema.invalidFormat": "'{0}'의 내용을 구문 분석할 수 없습니다: {1}행 {2}열에서 구문 오류가 발생했습니다",
+  "json.schema.invalidSchema": "스키마 '{0}'이(가) 유효하지 않습니다: {1}",
   "colorHexFormatWarning": "잘못된 색상 형식입니다. #RGB, #RGBA, #RRGGBB 또는 #RRGGBBAA를 사용하세요.",
   "dateTimeFormatWarning": "문자열이 RFC3339 날짜-시간 형식이 아닙니다.",
   "dateFormatWarning": "문자열이 RFC3339 날짜 형식이 아닙니다.",
diff --git a/l10n/bundle.l10n.zh-cn.json b/l10n/bundle.l10n.zh-cn.json
index fcd7a5172..0a94d14b4 100644
--- a/l10n/bundle.l10n.zh-cn.json
+++ b/l10n/bundle.l10n.zh-cn.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "加载引用 '{0}' 时出现问题：{1}",
   "json.schema.nocontent": "无法从“{0}”加载架构：没有内容。",
   "json.schema.invalidFormat": "无法解析来自“{0}”的内容：在第 {1} 行第 {2} 列发生解析错误",
+  "json.schema.invalidSchema": "架构 '{0}' 无效: {1}",
   "colorHexFormatWarning": "无效的颜色格式。请使用 #RGB、#RGBA、#RRGGBB 或 #RRGGBBAA。",
   "dateTimeFormatWarning": "字符串不是 RFC3339 日期时间格式。",
   "dateFormatWarning": "字符串不是 RFC3339 日期格式。",
diff --git a/l10n/bundle.l10n.zh-tw.json b/l10n/bundle.l10n.zh-tw.json
index 6aea89590..eb40562ad 100644
--- a/l10n/bundle.l10n.zh-tw.json
+++ b/l10n/bundle.l10n.zh-tw.json
@@ -4,6 +4,7 @@
   "json.schema.problemloadingref": "載入參考 '{0}' 時出現問題：{1}",
   "json.schema.nocontent": "無法從「{0}」載入結構描述：沒有內容。",
   "json.schema.invalidFormat": "無法解析來自「{0}」的內容：在第 {1} 行第 {2} 欄發生解析錯誤",
+  "json.schema.invalidSchema": "結構描述 '{0}' 無效：{1}",
   "colorHexFormatWarning": "無效的顏色格式。請使用 #RGB、#RGBA、#RRGGBB 或 #RRGGBBAA。",
   "dateTimeFormatWarning": "字串不是 RFC3339 日期時間格式。",
   "dateFormatWarning": "字串不是 RFC3339 日期格式。",
diff --git a/src/languageservice/jsonSchema.ts b/src/languageservice/jsonSchema.ts
index 37ffd0fab..de6966127 100644
--- a/src/languageservice/jsonSchema.ts
+++ b/src/languageservice/jsonSchema.ts
@@ -65,6 +65,24 @@ export interface JSONSchema {
   then?: JSONSchemaRef;
   else?: JSONSchemaRef;
 
+  // schema draft 2019-09
+  $anchor?: string;
+  $defs?: { [name: string]: JSONSchema };
+  $recursiveAnchor?: boolean;
+  $recursiveRef?: string;
+  $vocabulary?: Record<string, boolean>;
+  dependentSchemas?: JSONSchemaMap;
+  unevaluatedItems?: boolean | JSONSchemaRef;
+  unevaluatedProperties?: boolean | JSONSchemaRef;
+  dependentRequired?: Record<string, string[]>;
+  minContains?: number;
+  maxContains?: number;
+
+  // schema draft 2020-12
+  prefixItems?: JSONSchemaRef[];
+  $dynamicRef?: string;
+  $dynamicAnchor?: string;
+
   // VSCode extensions
 
   defaultSnippets?: {
diff --git a/src/languageservice/services/yamlSchemaService.ts b/src/languageservice/services/yamlSchemaService.ts
index a9ad24408..aeff53308 100644
--- a/src/languageservice/services/yamlSchemaService.ts
+++ b/src/languageservice/services/yamlSchemaService.ts
@@ -27,22 +27,29 @@ import { SchemaVersions } from '../yamlTypes';
 
 import { parse } from 'yaml';
 import * as Json from 'jsonc-parser';
-import Ajv, { DefinedError } from 'ajv';
+import Ajv, { DefinedError, type AnySchemaObject, type ValidateFunction } from 'ajv';
 import Ajv4 from 'ajv-draft-04';
-import { getSchemaTitle } from '../utils/schemaUtils';
+import Ajv2019 from 'ajv/dist/2019';
+import Ajv2020 from 'ajv/dist/2020';
 
-const ajv = new Ajv();
-const ajv4 = new Ajv4();
+const ajv4 = new Ajv4({ allErrors: true });
+const ajv7 = new Ajv({ allErrors: true });
+const ajv2019 = new Ajv2019({ allErrors: true });
+const ajv2020 = new Ajv2020({ allErrors: true });
 
-// load JSON Schema 07 def to validate loaded schemas
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const jsonSchema04 = require('ajv-draft-04/dist/refs/json-schema-draft-04.json');
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const jsonSchema07 = require('ajv/dist/refs/json-schema-draft-07.json');
-const schema07Validator = ajv.compile(jsonSchema07);
-
 // eslint-disable-next-line @typescript-eslint/no-var-requires
-const jsonSchema04 = require('ajv-draft-04/dist/refs/json-schema-draft-04.json');
+const jsonSchema2019 = require('ajv/dist/refs/json-schema-2019-09/schema.json');
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const jsonSchema2020 = require('ajv/dist/refs/json-schema-2020-12/schema.json');
+
 const schema04Validator = ajv4.compile(jsonSchema04);
-const SCHEMA_04_URI_WITH_HTTPS = ajv4.defaultMeta().replace('http://', 'https://');
+const schema07Validator = ajv7.compile(jsonSchema07);
+const schema2019Validator = ajv2019.compile(jsonSchema2019);
+const schema2020Validator = ajv2020.compile(jsonSchema2020);
 
 export declare type CustomSchemaProvider = (uri: string) => Promise<string | string[]>;
 
@@ -166,19 +173,24 @@ export class YAMLSchemaService extends JSONSchemaService {
     dependencies: SchemaDependencies
   ): Promise<ResolvedSchema> {
     const resolveErrors: string[] = schemaToResolve.errors.slice(0);
-    let schema: JSONSchema = schemaToResolve.schema;
-    const contextService = this.contextService;
+    const loc = toDisplayString(schemaURL);
+
+    const raw: unknown = schemaToResolve.schema;
+    if (raw === null || Array.isArray(raw) || (typeof raw !== 'object' && typeof raw !== 'boolean')) {
+      const got = raw === null ? 'null' : Array.isArray(raw) ? 'array' : typeof raw;
+      resolveErrors.push(l10n.t('json.schema.invalidSchema', loc, `expected a JSON Schema object or boolean, got ${got}`));
+      return new ResolvedSchema({}, resolveErrors);
+    }
 
-    const validator =
-      this.normalizeId(schema.$schema) === ajv4.defaultMeta() || this.normalizeId(schema.$schema) === SCHEMA_04_URI_WITH_HTTPS
-        ? schema04Validator
-        : schema07Validator;
-    if (!validator(schema)) {
+    const contextService = this.contextService;
+    let schema = raw as JSONSchema;
+    const validator = pickMetaValidator(schema.$schema);
+    if (validator && !validator(schema)) {
       const errs: string[] = [];
       for (const err of validator.errors as DefinedError[]) {
         errs.push(`${err.instancePath} : ${err.message}`);
       }
-      resolveErrors.push(`Schema '${getSchemaTitle(schemaToResolve.schema, schemaURL)}' is not valid:\n${errs.join('\n')}`);
+      resolveErrors.push(l10n.t('json.schema.invalidSchema', loc, `\n${errs.join('\n')}`));
     }
 
     const findSection = (schema: JSONSchema, path: string): JSONSchema => {
@@ -764,3 +776,38 @@ function getLineAndColumnFromOffset(text: string, offset: number): { line: numbe
   const column = lines[lines.length - 1].length + 1; // 1-based column number
   return { line, column };
 }
+
+function normalizeSchemaUri(uri: string | AnySchemaObject): string {
+  if (!uri) return '';
+
+  let s: string;
+  if (typeof uri === 'string') {
+    s = uri;
+  } else {
+    s = uri.$id || uri.id || '';
+  }
+  s = s.trim();
+
+  // strips fragment (# or #/something)
+  const hash = s.indexOf('#');
+
+  s = hash === -1 ? s : s.slice(0, hash);
+
+  // normalize http to https (don't normalize custom dialects)
+  s = s.replace(/^http:\/\/json-schema\.org\//i, 'https://json-schema.org/');
+
+  // normalize to no trailing slash
+  s = s.replace(/\/+$/g, '');
+  return s;
+}
+
+function pickMetaValidator(schema: string): ValidateFunction | undefined {
+  const s = normalizeSchemaUri(schema);
+  if (s === normalizeSchemaUri(ajv4.defaultMeta())) return schema04Validator;
+  if (s === normalizeSchemaUri(ajv7.defaultMeta())) return schema07Validator;
+  if (s === normalizeSchemaUri(ajv2019.defaultMeta())) return schema2019Validator;
+  if (s === normalizeSchemaUri(ajv2020.defaultMeta())) return schema2020Validator;
+
+  // don't meta-validate unknown schema URI
+  return undefined;
+}
diff --git a/test/schemaValidation.test.ts b/test/schemaValidation.test.ts
index cdd41f705..4b6cf4cd4 100644
--- a/test/schemaValidation.test.ts
+++ b/test/schemaValidation.test.ts
@@ -1968,14 +1968,86 @@ obj:
       expect(telemetry.messages).to.be.empty;
     });
 
-    it('should handle not valid schema object', async () => {
-      const schema = 'Foo';
-      schemaProvider.addSchema(SCHEMA_ID, schema as JSONSchema);
-      const content = `foo: bar`;
-      const result = await parseSetup(content);
-      expect(result).to.have.length(1);
-      expect(result[0].message).to.include("Schema 'default_schema_id.yaml' is not valid");
-      expect(telemetry.messages).to.be.empty;
+    describe('Schema meta-validation', () => {
+      it('should handle not valid schema object', async () => {
+        const schema = 'Foo';
+        schemaProvider.addSchema(SCHEMA_ID, schema as JSONSchema);
+        const content = `foo: bar`;
+        const result = await parseSetup(content);
+        expect(result).to.have.length(1);
+        expect(result[0].message).to.include('default_schema_id.yaml');
+        expect(result[0].message).to.include('is not valid:');
+        expect(result[0].message).to.include('expected a JSON Schema object or boolean, got string');
+        expect(telemetry.messages).to.be.empty;
+      });
+
+      const content = '6';
+
+      it('draft-04: exclusiveMinimum must be boolean', async () => {
+        const schema = {
+          $schema: 'http://json-schema.org/draft-04/schema#',
+          type: 'number',
+          minimum: 5,
+          exclusiveMinimum: 5,
+        } as unknown as JSONSchema;
+        schemaProvider.addSchema(SCHEMA_ID, schema);
+        const result = await parseSetup(content);
+        expect(result).to.have.length(1);
+        expect(result[0].message).to.include('default_schema_id.yaml');
+        expect(result[0].message).to.include('is not valid:');
+        expect(result[0].message).to.include('exclusiveMinimum');
+      });
+
+      it('draft-07: exclusiveMinimum must be number', async () => {
+        const schema: JSONSchema = {
+          $schema: 'http://json-schema.org/draft-07/schema#',
+          type: 'number',
+          minimum: 5,
+          exclusiveMinimum: true,
+        };
+        schemaProvider.addSchema(SCHEMA_ID, schema);
+        const result = await parseSetup(content);
+        expect(result).to.have.length(1);
+        expect(result[0].message).to.include('default_schema_id.yaml');
+        expect(result[0].message).to.include('is not valid:');
+        expect(result[0].message).to.include('exclusiveMinimum');
+      });
+
+      it('draft-2019-09: should handle invalid type in $defs', async () => {
+        const schema: JSONSchema = {
+          $schema: 'https://json-schema.org/draft/2019-09/schema',
+          $defs: {
+            foo: {
+              type: 'object',
+              properties: {
+                bar: {
+                  type: ['foo', 'bar'],
+                },
+              },
+            },
+          },
+        };
+        schemaProvider.addSchema(SCHEMA_ID, schema);
+        const result = await parseSetup(content);
+        expect(result).to.have.length(1);
+        expect(result[0].message).to.include('default_schema_id.yaml');
+        expect(result[0].message).to.include('is not valid:');
+        expect(result[0].message).to.include('$defs');
+      });
+
+      it('draft-2020-12: prefixItems must be an array', async () => {
+        const schema = {
+          $schema: 'https://json-schema.org/draft/2020-12/schema',
+          type: 'number',
+          prefixItems: 'foo',
+        } as unknown as JSONSchema;
+        schemaProvider.addSchema(SCHEMA_ID, schema);
+        const result = await parseSetup(content);
+        expect(result).to.have.length(1);
+        expect(result[0].message).to.include('default_schema_id.yaml');
+        expect(result[0].message).to.include('is not valid:');
+        expect(result[0].message).to.include('prefixItems');
+      });
     });
 
     it('should handle bad schema refs', async () => {