diff --git a/index.d.ts b/index.d.ts
index acf7d68..2aa3b75 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -34,6 +34,14 @@ declare namespace Bowser {
     interface Parser {
       constructor(UA: string, skipParsing?: boolean): Parser.Parser;
 
+      /**
+       * Check if the version is equals the browser version
+       * @param version The string to compare with the browser version
+       * @returns {boolean}
+       */
+
+      compareVersion(version: string): boolean;
+
       /**
        * Get parsed browser object
        * @return {BrowserDetails} Browser's details
@@ -135,6 +143,39 @@ declare namespace Bowser {
 
       is(anything: any): boolean;
 
+      /**
+       * Check if the browser name equals the passed string
+       * @param browserName The string to compare with the browser name
+       * @param [includingAlias=false] The flag showing whether alias will be included into comparison
+       * @returns {boolean}
+       */
+
+      isBrowser(browserName: string, includingAlias?: boolean): boolean;
+
+      /**
+       * Check if the engine name equals the passed string
+       * @param engineName The string to compare with the engine name
+       * @returns {boolean}
+       */
+
+      isEngine(engineName: string): boolean;
+
+      /**
+       * Check if the OS name equals the passed string
+       * @param OSName The string to compare with the OS name
+       * @returns {boolean}
+       */
+
+      isOS(OSName: string): boolean;
+
+      /**
+       * Check if the platform name equals the passed string
+       * @param platformName The string to compare with the platform name
+       * @returns {boolean}
+       */
+
+      isPlatform(platformName: string): boolean;
+
       /**
        * Parse full information about the browser
        * @returns {Parser.Parser}
@@ -191,16 +232,6 @@ declare namespace Bowser {
 
       satisfies(checkTree: checkTree): boolean | undefined;
 
-       /**
-       * Check if the browser name equals the passed string
-       * @param browserName The string to compare with the browser name
-       * @param [includingAlias=false] The flag showing whether alias will be included into comparison
-       * @returns {boolean}
-       */
-
-
-      isBrowser(browserName: string, includingAlias?: boolean): boolean;
-
       /**
        * Check if any of the given values satifies `.is(anything)`
        * @param {string[]} anythings