diff --git a/package-lock.json b/package-lock.json
index f96788dfa..30adb4234 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -968,9 +968,9 @@
 			"optional": true
 		},
 		"aws4": {
-			"version": "1.8.0",
-			"resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
-			"integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
+			"version": "1.9.1",
+			"resolved": "https://registry.npmjs.org/aws4/-/aws4-1.9.1.tgz",
+			"integrity": "sha512-wMHVg2EOHaMRxbzgFJ9gtjOOCrI80OHLG14rxi28XwOW8ux6IiEbRCGGGqCtdAIg4FQCbW20k9RsT4y3gJlFug==",
 			"dev": true,
 			"optional": true
 		},
@@ -7838,9 +7838,9 @@
 			}
 		},
 		"less": {
-			"version": "3.10.3",
-			"resolved": "https://registry.npmjs.org/less/-/less-3.10.3.tgz",
-			"integrity": "sha512-vz32vqfgmoxF1h3K4J+yKCtajH0PWmjkIFgbs5d78E/c/e+UQTnI+lWK+1eQRE95PXM2mC3rJlLSSP9VQHnaow==",
+			"version": "3.11.0",
+			"resolved": "https://registry.npmjs.org/less/-/less-3.11.0.tgz",
+			"integrity": "sha512-dAui5qzfxuWY7BIEt9/gy5EbDhwDb44rqaIUFYeu8wEE8huMZ/PzB+gNFONEG5DUPrOrOGcAjGeYVg6AFiA9KQ==",
 			"dev": true,
 			"requires": {
 				"clone": "^2.1.2",
@@ -13487,9 +13487,9 @@
 			"dev": true
 		},
 		"psl": {
-			"version": "1.4.0",
-			"resolved": "https://registry.npmjs.org/psl/-/psl-1.4.0.tgz",
-			"integrity": "sha512-HZzqCGPecFLyoRj5HLfuDSKYTJkAfB5thKBIkRHtGjWwY7p1dAyveIbXIq4tO0KYfDF2tHqPUgY9SDnGm00uFw==",
+			"version": "1.7.0",
+			"resolved": "https://registry.npmjs.org/psl/-/psl-1.7.0.tgz",
+			"integrity": "sha512-5NsSEDv8zY70ScRnOTn7bK7eanl2MvFrOrS/R6x+dBt5g1ghnj9Zv90kO8GwT8gxcu2ANyFprnFYB85IogIJOQ==",
 			"dev": true,
 			"optional": true
 		},
diff --git a/package.json b/package.json
index 99d6f874d..1f92d8896 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,7 @@
 		"karma-mocha": "^1.3.0",
 		"karma-sourcemap-loader": "^0.3.7",
 		"karma-webpack": "^4.0.2",
-		"less": "^3.10.3",
+		"less": "^3.11.0",
 		"less-loader": "^4.1.0",
 		"lint-staged": "^8.2.1",
 		"merge-stream": "^2.0.0",
diff --git a/src/modules/helpers/JoditArray.ts b/src/modules/helpers/JoditArray.ts
index 51514ccdf..99cb898e9 100644
--- a/src/modules/helpers/JoditArray.ts
+++ b/src/modules/helpers/JoditArray.ts
@@ -7,8 +7,9 @@
 import { extend } from './extend';
 
 export class JoditArray {
-	public length: number = 0;
-	public toString() {
+	length: number = 0;
+
+	toString() {
 		const out = [];
 
 		for (let i = 0; i < this.length; i += 1) {
@@ -17,6 +18,7 @@ export class JoditArray {
 
 		return out.toString();
 	}
+
 	constructor(data: any[]) {
 		extend(true, this, data);
 		this.length = data.length;
diff --git a/src/plugins/source/editor/engines/custom.ts b/src/plugins/source/editor/engines/custom.ts
index e33891457..44a06ab60 100644
--- a/src/plugins/source/editor/engines/custom.ts
+++ b/src/plugins/source/editor/engines/custom.ts
@@ -4,13 +4,13 @@
  * Copyright (c) 2013-2020 Valeriy Chupurnov. All rights reserved. https://xdsoft.net
  */
 
-import { IJodit, ISourceEditor } from '../../../../types';
+import { ISourceEditor } from '../../../../types';
 import { SourceEditor } from '../SourceEditor';
 
 export class CustomEditor extends SourceEditor<HTMLTextAreaElement>
 	implements ISourceEditor {
 
-	init(editor: IJodit): any {
+	init(): any {
 		this.onReady();
 	}
 
diff --git a/tsconfig.json b/tsconfig.json
index 7c16e01da..5659b9d04 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,26 +3,31 @@
 		"target": "es5",
 		"moduleResolution": "node",
 
+		"resolveJsonModule": true,
+		"allowJs": true,
+
 		"removeComments": true,
+
 		"strict": true,
 		"strictNullChecks": true,
 		"strictFunctionTypes": true,
 		"strictBindCallApply": true,
-
-		"forceConsistentCasingInFileNames": true,
 		"strictPropertyInitialization": true,
 
-		"sourceMap": true,
-
 		"noImplicitAny": true,
 		"noImplicitReturns": true,
 		"noUnusedLocals": true,
+		"noUnusedParameters": false,
 		"noImplicitThis": true,
 
-		"importHelpers": true,
+		"forceConsistentCasingInFileNames": true,
+
+		"sourceMap": true,
 
+		"importHelpers": true,
+		"typeRoots": ["./node_modules/@types"],
 		"lib": ["es5", "esnext", "dom", "scripthost"]
 	},
-
+	"include": ["./src/**/*.ts", "./test/**/*.ts", "./types/**/*.d.ts"],
 	"exclude": ["node_modules", "build"]
 }