diff --git a/package.json b/package.json
index b44d5cb..a79dcf2 100644
--- a/package.json
+++ b/package.json
@@ -4,14 +4,12 @@
   "description": "Wrap the text with the opening and closing chars.",
   "author": "Angular Package <contact@angular-package.dev> (https://angular-package.dev)",
   "homepage": "https://github.com/angular-package/wrapper#readme",
-  "peerDependencies": {
-    "@angular-package/type": "^5.0.0"
-  },
   "dependencies": {
     "tslib": "^2.3.0"
   },
   "devDependencies": {
-    "@angular-package/testing": "^2.0.0"
+    "@angular-package/testing": "^2.0.0",
+    "@angular-package/type": "^5.0.0"
   },
   "publishConfig": {
     "access": "public",
diff --git a/src/lib/wrap.class.ts b/src/lib/wrap.class.ts
index 836c08f..be59ee6 100644
--- a/src/lib/wrap.class.ts
+++ b/src/lib/wrap.class.ts
@@ -1,9 +1,3 @@
-// @angular-package/type.
-import {
-  isStringLength,
-  isStringType,
-  isInstance,
-} from '@angular-package/type';
 /**
  * The `Wrap` object represents the immutable text wrapped by the opening and closing chars. It is designed to preserve the names of the
  * opening, text and closing.
@@ -79,8 +73,10 @@ export class Wrap<
    */
   public static hasClosing(text: string, closing: string): boolean {
     return (
-      isStringLength(text, { min: 1 }) &&
-      isStringLength(closing, { min: 1 }) &&
+      typeof text === 'string' &&
+      text.length >= 1 &&
+      typeof closing === 'string' &&
+      closing.length >= 1 &&
       text.slice(-closing.length) === closing
     );
   }
@@ -94,8 +90,10 @@ export class Wrap<
    */
   public static hasOpening(text: string, opening: string): boolean {
     return (
-      isStringLength(text, { min: 1 }) &&
-      isStringLength(opening, { min: 1 }) &&
+      typeof text === 'string' &&
+      text.length >= 1 &&
+      typeof opening === 'string' &&
+      opening.length >= 1 &&
       text.slice(0, opening.length) === opening
     );
   }
@@ -120,10 +118,10 @@ export class Wrap<
     closing?: Closing,
     text?: Text
   ): value is Wrap<Opening, Text, Closing> {
-    return isInstance(value, this)
-      ? (isStringType(opening) ? opening === value.opening : true) &&
-          (isStringType(closing) ? closing === value.closing : true) &&
-          (isStringType(text) ? text === value.text : true)
+    return typeof value === 'object' && value instanceof this
+      ? (typeof opening === 'string' ? opening === value.opening : true) &&
+          (typeof closing === 'string' ? closing === value.closing : true) &&
+          (typeof text === 'string' ? text === value.text : true)
       : false;
   }
   //#endregion static public methods.
@@ -181,8 +179,8 @@ export class Wrap<
    */
   public hasClosing(closing?: string): boolean {
     return (
-      isStringLength(this.#closing, { min: 1 }) &&
-      (isStringType(closing) ? this.#closing === closing : true)
+      this.#closing.length >= 1 &&
+      (typeof closing === 'string' ? this.#closing === closing : true)
     );
   }
 
@@ -195,8 +193,8 @@ export class Wrap<
    */
   public hasOpening(opening?: string): boolean {
     return (
-      isStringLength(this.#opening, { min: 1 }) &&
-      (isStringType(opening) ? this.#opening === opening : true)
+      this.#opening.length >= 1 &&
+      (typeof opening === 'string' ? this.#opening === opening : true)
     );
   }
 
@@ -209,8 +207,8 @@ export class Wrap<
    */
   public hasText(text?: string): boolean {
     return (
-      isStringLength(this.#text, { min: 1 }) &&
-      (isStringType(text) ? this.#text === text : true)
+      this.#text.length >= 1 &&
+      (typeof text === 'string' ? this.#text === text : true)
     );
   }
 
diff --git a/src/lib/wrapper.class.ts b/src/lib/wrapper.class.ts
index a4a8b94..e104897 100644
--- a/src/lib/wrapper.class.ts
+++ b/src/lib/wrapper.class.ts
@@ -1,12 +1,10 @@
-// @angular-package/type.
-import { isInstance } from '@angular-package/type';
 // Class.
 import { Wrap } from './wrap.class';
 // Type.
 import { Wrapped } from '../type/wrapped.type';
 /**
  * The `Wrapper` is an extension of the `Wrap` object, which means it represents the immutable wrap of the opening and closing with the
- * additional ability to use it to wrap.
+ * additional ability to use it to wrap strings.
  */
 export class Wrapper<
   Opening extends string = string,
@@ -65,7 +63,9 @@ export class Wrapper<
     text?: Text
   ): value is Wrapper<Opening, Text, Closing> {
     return (
-      isInstance(value, this) && super.isWrap(value, opening, closing, text)
+      typeof value === 'object' &&
+      value instanceof this &&
+      super.isWrap(value, opening, closing, text)
     );
   }
 
@@ -88,7 +88,7 @@ export class Wrapper<
   }
 
   /**
-   * Replaces the opening chars in a given `text` with a given replacement value at the end of the text.
+   * Replaces the opening chars in a given `text` with a given replacement value at the beginning of the text.
    * @param text The text of `string` type in which the given `opening` chars are replaced by a given replacement value.
    * @param opening The opening chars of the `string` to replace by a given replacement value at the beginning of the given `text`.
    * @param replaceValue Replacement value for the `opening` characters in the given `text`.
@@ -106,7 +106,7 @@ export class Wrapper<
   }
 
   /**
-   * The method returns the text without the given opening and closing chars.
+   * The method returns the text without the given `opening` and `closing` chars.
    * @param text The text of the `string` from which given opening and closing chars are removed.
    * @param opening The opening chars of the `string` to be removed in the given `text`.
    * @param closing The closing chars of the `string` to be removed in the given `text`.