diff --git a/.vscode/settings.json b/.vscode/settings.json
index 034279a342..f144f59202 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,16 +1,9 @@
 {
-    "cSpell.words": [
-        "clippy",
-        "docx",
-        "dolan",
-        "miu",
-        "officegen",
-        "typedoc"
-    ],
+    "cSpell.words": ["clippy", "docx", "dolan", "miu", "officegen", "typedoc"],
     "prettier.trailingComma": "all",
     "prettier.printWidth": 140,
-    "editor.formatOnSave": true,
+    "editor.formatOnSave": false,
     "prettier.tabWidth": 4,
     "prettier.arrowParens": "always",
-    "prettier.bracketSpacing": true,
+    "prettier.bracketSpacing": true
 }
diff --git a/demo/demo8.js b/demo/demo8.js
new file mode 100644
index 0000000000..4bde11e1fc
--- /dev/null
+++ b/demo/demo8.js
@@ -0,0 +1,12 @@
+const docx = require('../build');
+
+var doc = new docx.File();
+
+doc.createParagraph("Hello World");
+
+doc.Header.createParagraph("Header text");
+
+var exporter = new docx.LocalPacker(doc);
+exporter.pack('My Document');
+
+console.log('Document created succesfully at project root!');
diff --git a/src/export/packer/compiler.ts b/src/export/packer/compiler.ts
index 33ac1fa604..76bdcc2dad 100644
--- a/src/export/packer/compiler.ts
+++ b/src/export/packer/compiler.ts
@@ -42,6 +42,7 @@ export class Compiler {
         });
         const xmlNumbering = xml(this.formatter.format(this.file.Numbering));
         const xmlRelationships = xml(this.formatter.format(this.file.Relationships));
+        const xmlHeader = xml(this.formatter.format(this.file.Header));
 
         this.archive.append(xmlDocument, {
             name: "word/document.xml",
@@ -59,6 +60,10 @@ export class Compiler {
             name: "word/numbering.xml",
         });
 
+        this.archive.append(xmlHeader, {
+            name: "word/header1.xml",
+        });
+
         this.archive.append(xmlRelationships, {
             name: "word/_rels/document.xml.rels",
         });
diff --git a/src/export/packer/express.ts b/src/export/packer/express.ts
index e6ee3693ac..4f99298424 100644
--- a/src/export/packer/express.ts
+++ b/src/export/packer/express.ts
@@ -5,10 +5,9 @@ import { Compiler } from "./compiler";
 import { IPacker } from "./packer";
 
 export class ExpressPacker implements IPacker {
-    private res: express.Response;
-    private packer: Compiler;
+    private readonly packer: Compiler;
 
-    constructor(file: File, res: express.Response) {
+    constructor(file: File, private readonly res: express.Response) {
         this.packer = new Compiler(file);
 
         this.res = res;
diff --git a/src/export/packer/local.ts b/src/export/packer/local.ts
index 2e33f74dfc..5d0c05fe81 100644
--- a/src/export/packer/local.ts
+++ b/src/export/packer/local.ts
@@ -9,8 +9,8 @@ import { PdfConvertWrapper } from "./pdf-convert-wrapper";
 
 export class LocalPacker implements IPacker {
     private stream: fs.WriteStream;
-    private pdfConverter: PdfConvertWrapper;
-    private packer: Compiler;
+    private readonly pdfConverter: PdfConvertWrapper;
+    private readonly packer: Compiler;
 
     constructor(file: File) {
         this.pdfConverter = new PdfConvertWrapper();
diff --git a/src/file/document/body/section-properties/header-reference/header-reference-attributes.ts b/src/file/document/body/section-properties/header-reference/header-reference-attributes.ts
new file mode 100644
index 0000000000..b0407c4a0a
--- /dev/null
+++ b/src/file/document/body/section-properties/header-reference/header-reference-attributes.ts
@@ -0,0 +1,13 @@
+import { XmlAttributeComponent } from "file/xml-components";
+
+export interface IHeaderReferenceAttributes {
+    type: string;
+    id: string;
+}
+
+export class HeaderReferenceAttributes extends XmlAttributeComponent<IHeaderReferenceAttributes> {
+    protected xmlKeys = {
+        type: "w:type",
+        id: "r:id",
+    };
+}
diff --git a/src/file/document/body/section-properties/header-reference/header-reference.ts b/src/file/document/body/section-properties/header-reference/header-reference.ts
new file mode 100644
index 0000000000..3809047bef
--- /dev/null
+++ b/src/file/document/body/section-properties/header-reference/header-reference.ts
@@ -0,0 +1,14 @@
+import { XmlComponent } from "file/xml-components";
+import { HeaderReferenceAttributes } from "./header-reference-attributes";
+
+export class HeaderReference extends XmlComponent {
+    constructor() {
+        super("w:headerReference");
+        this.root.push(
+            new HeaderReferenceAttributes({
+                type: "default",
+                id: `rId${3}`,
+            }),
+        );
+    }
+}
diff --git a/src/file/document/body/section-properties/section-properties.ts b/src/file/document/body/section-properties/section-properties.ts
index 097fff225f..a7aae06f10 100644
--- a/src/file/document/body/section-properties/section-properties.ts
+++ b/src/file/document/body/section-properties/section-properties.ts
@@ -1,13 +1,14 @@
 // http://officeopenxml.com/WPsection.php
-import { IColumnsAttributes } from "file/document/body/section-properties/columns/columns-attributes";
-import { IPageMarginAttributes } from "file/document/body/section-properties/page-margin/page-margin-attributes";
-import { IPageSizeAttributes } from "file/document/body/section-properties/page-size/page-size-attributes";
 import { XmlComponent } from "file/xml-components";
 import { Columns } from "./columns/columns";
+import { IColumnsAttributes } from "./columns/columns-attributes";
 import { DocumentGrid } from "./doc-grid/doc-grid";
 import { IDocGridAttributesProperties } from "./doc-grid/doc-grid-attributes";
+import { HeaderReference } from "./header-reference/header-reference";
 import { PageMargin } from "./page-margin/page-margin";
+import { IPageMarginAttributes } from "./page-margin/page-margin-attributes";
 import { PageSize } from "./page-size/page-size";
+import { IPageSizeAttributes } from "./page-size/page-size-attributes";
 
 export type SectionPropertiesOptions = IPageSizeAttributes & IPageMarginAttributes & IColumnsAttributes & IDocGridAttributesProperties;
 
@@ -49,5 +50,6 @@ export class SectionProperties extends XmlComponent {
         );
         this.root.push(new Columns(mergedOptions.space));
         this.root.push(new DocumentGrid(mergedOptions.linePitch));
+        this.root.push(new HeaderReference());
     }
 }
diff --git a/src/file/document/document.ts b/src/file/document/document.ts
index f29b2795b4..f4d580b9ca 100644
--- a/src/file/document/document.ts
+++ b/src/file/document/document.ts
@@ -8,7 +8,7 @@ import { SectionPropertiesOptions } from "./body/section-properties/section-prop
 import { DocumentAttributes } from "./document-attributes";
 
 export class Document extends XmlComponent {
-    private body: Body;
+    private readonly body: Body;
 
     constructor(sectionPropertiesOptions?: SectionPropertiesOptions) {
         super("w:document");
diff --git a/src/file/file.ts b/src/file/file.ts
index 03265a083e..9f6f3016a8 100644
--- a/src/file/file.ts
+++ b/src/file/file.ts
@@ -1,21 +1,23 @@
-import { Relationships } from "file/relationships";
 import { Document } from "./document";
 import { SectionPropertiesOptions } from "./document/body/section-properties/section-properties";
+import { Header } from "./header/header";
 import { Media } from "./media";
 import { Numbering } from "./numbering";
 import { Paragraph } from "./paragraph";
 import { IPropertiesOptions, Properties } from "./properties";
+import { Relationships } from "./relationships";
 import { Styles } from "./styles";
 import { DefaultStylesFactory } from "./styles/factory";
 import { Table } from "./table";
 
 export class File {
-    private document: Document;
-    private styles: Styles;
-    private properties: Properties;
-    private numbering: Numbering;
-    private media: Media;
-    private relationships: Relationships;
+    private readonly document: Document;
+    private readonly styles: Styles;
+    private readonly properties: Properties;
+    private readonly numbering: Numbering;
+    private readonly media: Media;
+    private readonly relationships: Relationships;
+    private readonly header: Header;
 
     constructor(options?: IPropertiesOptions, sectionPropertiesOptions?: SectionPropertiesOptions) {
         this.document = new Document(sectionPropertiesOptions);
@@ -32,8 +34,9 @@ export class File {
 
         this.properties = new Properties(options);
         this.numbering = new Numbering();
-        this.media = new Media();
         this.relationships = new Relationships();
+        this.media = new Media();
+        this.header = new Header();
     }
 
     public addParagraph(paragraph: Paragraph): void {
@@ -41,7 +44,7 @@ export class File {
     }
 
     public createParagraph(text?: string): Paragraph {
-        return this.document.createParagraph();
+        return this.document.createParagraph(text);
     }
 
     public addTable(table: Table): void {
@@ -53,7 +56,7 @@ export class File {
     }
 
     public createImage(image: string): void {
-        const mediaData = this.media.addMedia(image);
+        const mediaData = this.media.addMedia(image, this.relationships.RelationshipCount);
         this.relationships.createRelationship(
             mediaData.referenceId,
             "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image",
@@ -85,4 +88,8 @@ export class File {
     public get Relationships(): Relationships {
         return this.relationships;
     }
+
+    public get Header(): Header {
+        return this.header;
+    }
 }
diff --git a/src/file/header/header-attributes.ts b/src/file/header/header-attributes.ts
new file mode 100644
index 0000000000..e893306192
--- /dev/null
+++ b/src/file/header/header-attributes.ts
@@ -0,0 +1,31 @@
+import { XmlAttributeComponent } from "file/xml-components";
+
+export interface IHeaderAttributesProperties {
+    o?: string;
+    r?: string;
+    v?: string;
+    w?: string;
+    w10?: string;
+    wp?: string;
+    wps?: string;
+    wpg?: string;
+    mc?: string;
+    wp14?: string;
+    w14?: string;
+}
+
+export class HeaderAttributes extends XmlAttributeComponent<IHeaderAttributesProperties> {
+    protected xmlKeys = {
+        o: "xmlns:o",
+        r: "xmlns:r",
+        v: "xmlns:v",
+        w: "xmlns:w",
+        w10: "xmlns:w10",
+        wp: "xmlns:wp",
+        wps: "xmlns:wps",
+        wpg: "xmlns:wpg",
+        mc: "xmlns:mc",
+        wp14: "xmlns:wp14",
+        w14: "xmlns:w14",
+    };
+}
diff --git a/src/file/header/header.ts b/src/file/header/header.ts
new file mode 100644
index 0000000000..8e2c37fe2d
--- /dev/null
+++ b/src/file/header/header.ts
@@ -0,0 +1,61 @@
+// http://officeopenxml.com/WPheaders.php
+import { IMediaData } from "file/media";
+import { XmlComponent } from "file/xml-components";
+import { Paragraph, PictureRun } from "../paragraph";
+import { Table } from "../table";
+import { HeaderAttributes } from "./header-attributes";
+
+export class Header extends XmlComponent {
+    constructor() {
+        super("w:hdr");
+        this.root.push(
+            new HeaderAttributes({
+                o: "urn:schemas-microsoft-com:office:office",
+                r: "http://schemas.openxmlformats.org/officeDocument/2006/relationships",
+                v: "urn:schemas-microsoft-com:vml",
+                w: "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
+                w10: "urn:schemas-microsoft-com:office:word",
+                wp: "http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing",
+                wps: "http://schemas.microsoft.com/office/word/2010/wordprocessingShape",
+                wpg: "http://schemas.microsoft.com/office/word/2010/wordprocessingGroup",
+                mc: "http://schemas.openxmlformats.org/markup-compatibility/2006",
+                wp14: "http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing",
+                w14: "http://schemas.microsoft.com/office/word/2010/wordml",
+            }),
+        );
+    }
+
+    public addParagraph(paragraph: Paragraph): void {
+        this.root.push(paragraph);
+    }
+
+    public createParagraph(text?: string): Paragraph {
+        const para = new Paragraph(text);
+        this.addParagraph(para);
+        return para;
+    }
+
+    public addTable(table: Table): void {
+        this.root.push(table);
+    }
+
+    public createTable(rows: number, cols: number): Table {
+        const table = new Table(rows, cols);
+        this.addTable(table);
+        return table;
+    }
+
+    public addDrawing(imageData: IMediaData): void {
+        const paragraph = new Paragraph();
+        const run = new PictureRun(imageData);
+        paragraph.addRun(run);
+
+        this.root.push(paragraph);
+    }
+
+    public createDrawing(imageData: IMediaData): void {
+        this.addDrawing(imageData);
+
+        return;
+    }
+}
diff --git a/src/file/media/media.ts b/src/file/media/media.ts
index 854d19194a..a244807599 100644
--- a/src/file/media/media.ts
+++ b/src/file/media/media.ts
@@ -5,7 +5,7 @@ import * as path from "path";
 import { IMediaData } from "./data";
 
 export class Media {
-    private map: Map<string, IMediaData>;
+    private readonly map: Map<string, IMediaData>;
 
     constructor() {
         this.map = new Map<string, IMediaData>();
@@ -21,12 +21,12 @@ export class Media {
         return data;
     }
 
-    public addMedia(filePath: string): IMediaData {
+    public addMedia(filePath: string, relationshipsCount: number): IMediaData {
         const key = path.basename(filePath);
         const dimensions = sizeOf(filePath);
 
         const imageData = {
-            referenceId: this.map.size + 3,
+            referenceId: this.map.size + relationshipsCount,
             stream: fs.createReadStream(filePath),
             path: filePath,
             fileName: key,
diff --git a/src/file/numbering/level.ts b/src/file/numbering/level.ts
index ab8c3ccb53..bb50bfb2e2 100644
--- a/src/file/numbering/level.ts
+++ b/src/file/numbering/level.ts
@@ -61,8 +61,8 @@ class LevelJc extends XmlComponent {
 }
 
 export class LevelBase extends XmlComponent {
-    private paragraphProperties: ParagraphProperties;
-    private runProperties: RunProperties;
+    private readonly paragraphProperties: ParagraphProperties;
+    private readonly runProperties: RunProperties;
 
     constructor(level: number, start?: number, numberFormat?: string, levelText?: string, lvlJc?: string) {
         super("w:lvl");
diff --git a/src/file/numbering/num.ts b/src/file/numbering/num.ts
index e6b4628ac4..cd3034d920 100644
--- a/src/file/numbering/num.ts
+++ b/src/file/numbering/num.ts
@@ -46,16 +46,14 @@ class LevelOverrideAttributes extends XmlAttributeComponent<{ ilvl: number }> {
 }
 
 export class LevelOverride extends XmlComponent {
-    private levelNum: number;
     private lvl?: LevelForOverride;
 
-    constructor(levelNum: number, start?: number) {
+    constructor(private readonly levelNum: number, start?: number) {
         super("w:lvlOverride");
         this.root.push(new LevelOverrideAttributes({ ilvl: levelNum }));
         if (start !== undefined) {
             this.root.push(new StartOverride(start));
         }
-        this.levelNum = levelNum;
     }
 
     get level(): LevelForOverride {
diff --git a/src/file/relationships/relationship/relationship.ts b/src/file/relationships/relationship/relationship.ts
index e40d43bc5b..e3ac807946 100644
--- a/src/file/relationships/relationship/relationship.ts
+++ b/src/file/relationships/relationship/relationship.ts
@@ -8,7 +8,8 @@ export type RelationshipType =
     | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"
     | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTable"
     | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettings"
-    | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/numbering";
+    | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/numbering"
+    | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/header";
 
 export class Relationship extends XmlComponent {
     constructor(id: string, type: RelationshipType, target: string) {
diff --git a/src/file/relationships/relationships.ts b/src/file/relationships/relationships.ts
index f338bdd736..c665be063e 100644
--- a/src/file/relationships/relationships.ts
+++ b/src/file/relationships/relationships.ts
@@ -13,6 +13,7 @@ export class Relationships extends XmlComponent {
 
         this.createRelationship(1, "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles", "styles.xml");
         this.createRelationship(2, "http://schemas.openxmlformats.org/officeDocument/2006/relationships/numbering", "numbering.xml");
+        this.createRelationship(3, "http://schemas.openxmlformats.org/officeDocument/2006/relationships/header", "header1.xml");
     }
 
     public addRelationship(relationship: Relationship): void {
@@ -25,4 +26,8 @@ export class Relationships extends XmlComponent {
 
         return relationship;
     }
+
+    public get RelationshipCount(): number {
+        return this.root.length - 1;
+    }
 }
diff --git a/src/file/styles/defaults/index.ts b/src/file/styles/defaults/index.ts
index 811eb0aa1d..2b6c49e299 100644
--- a/src/file/styles/defaults/index.ts
+++ b/src/file/styles/defaults/index.ts
@@ -3,8 +3,8 @@ import { ParagraphPropertiesDefaults } from "./paragraph-properties";
 import { RunPropertiesDefaults } from "./run-properties";
 
 export class DocumentDefaults extends XmlComponent {
-    private runPropertiesDefaults: RunPropertiesDefaults;
-    private paragraphPropertiesDefaults: ParagraphPropertiesDefaults;
+    private readonly runPropertiesDefaults: RunPropertiesDefaults;
+    private readonly paragraphPropertiesDefaults: ParagraphPropertiesDefaults;
 
     constructor() {
         super("w:docDefaults");
diff --git a/src/file/styles/defaults/run-properties.ts b/src/file/styles/defaults/run-properties.ts
index 242aa3e58d..c00b6ccc79 100644
--- a/src/file/styles/defaults/run-properties.ts
+++ b/src/file/styles/defaults/run-properties.ts
@@ -4,7 +4,7 @@ import { RunProperties } from "../../paragraph/run/properties";
 import { RunFonts } from "../../paragraph/run/run-fonts";
 
 export class RunPropertiesDefaults extends XmlComponent {
-    private properties: RunProperties;
+    private readonly properties: RunProperties;
 
     constructor() {
         super("w:rPrDefault");
diff --git a/src/file/styles/style/index.ts b/src/file/styles/style/index.ts
index 50265f182a..7436fbb22a 100644
--- a/src/file/styles/style/index.ts
+++ b/src/file/styles/style/index.ts
@@ -36,8 +36,8 @@ export class Style extends XmlComponent {
 }
 
 export class ParagraphStyle extends Style {
-    private paragraphProperties: paragraph.ParagraphProperties;
-    private runProperties: RunProperties;
+    private readonly paragraphProperties: paragraph.ParagraphProperties;
+    private readonly runProperties: RunProperties;
 
     constructor(styleId: string, name?: string) {
         super({ type: "paragraph", styleId: styleId }, name);
diff --git a/src/file/table/table.ts b/src/file/table/table.ts
index 43a41cd78e..f11b6959c7 100644
--- a/src/file/table/table.ts
+++ b/src/file/table/table.ts
@@ -5,9 +5,9 @@ import { TableGrid } from "./grid";
 import { TableProperties, WidthTypes } from "./properties";
 
 export class Table extends XmlComponent {
-    private properties: TableProperties;
-    private rows: TableRow[];
-    private grid: TableGrid;
+    private readonly properties: TableProperties;
+    private readonly rows: TableRow[];
+    private readonly grid: TableGrid;
 
     constructor(rows: number, cols: number) {
         super("w:tbl");
@@ -63,14 +63,12 @@ export class Table extends XmlComponent {
 }
 
 export class TableRow extends XmlComponent {
-    private properties: TableRowProperties;
-    private cells: TableCell[];
+    private readonly properties: TableRowProperties;
 
-    constructor(cells: TableCell[]) {
+    constructor(private readonly cells: TableCell[]) {
         super("w:tr");
         this.properties = new TableRowProperties();
         this.root.push(this.properties);
-        this.cells = cells;
         cells.forEach((c) => this.root.push(c));
     }
 
@@ -86,7 +84,7 @@ export class TableRowProperties extends XmlComponent {
 }
 
 export class TableCell extends XmlComponent {
-    private properties: TableCellProperties;
+    private readonly properties: TableCellProperties;
 
     constructor() {
         super("w:tc");
diff --git a/template/[Content_Types].xml b/template/[Content_Types].xml
index 996f6a2bea..978bf4e3fe 100644
--- a/template/[Content_Types].xml
+++ b/template/[Content_Types].xml
@@ -8,6 +8,7 @@
         <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml" />
         <Default Extension="xml" ContentType="application/xml" />
         <Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml" />
+        <Override PartName="/word/header1.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml"/>
         <Override PartName="/word/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml" />
         <Override PartName="/docProps/core.xml" ContentType="application/vnd.openxmlformats-package.core-properties+xml" />
         <Override PartName="/docProps/app.xml" ContentType="application/vnd.openxmlformats-officedocument.extended-properties+xml" />