diff --git a/src/file/relationships/relationship/relationship-attributes.ts b/src/file/relationships/relationship/relationship-attributes.ts
index 1b23e26977..1cb3e116c0 100644
--- a/src/file/relationships/relationship/relationship-attributes.ts
+++ b/src/file/relationships/relationship/relationship-attributes.ts
@@ -4,6 +4,7 @@ export interface IRelationshipAttributesProperties {
     id: string;
     type: string;
     target: string;
+    targetMode?: string;
 }
 
 export class RelationshipAttributes extends XmlAttributeComponent<IRelationshipAttributesProperties> {
@@ -11,5 +12,6 @@ export class RelationshipAttributes extends XmlAttributeComponent<IRelationshipA
         id: "Id",
         type: "Type",
         target: "Target",
+        targetMode: "TargetMode",
     };
 }
diff --git a/src/file/relationships/relationship/relationship.ts b/src/file/relationships/relationship/relationship.ts
index fdf927e1e8..3986451257 100644
--- a/src/file/relationships/relationship/relationship.ts
+++ b/src/file/relationships/relationship/relationship.ts
@@ -13,10 +13,13 @@ export type RelationshipType =
     | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer"
     | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"
     | "http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties"
-    | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties";
+    | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties"
+    | "http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink";
+
+export type TargetModeType = "External";
 
 export class Relationship extends XmlComponent {
-    constructor(id: string, type: RelationshipType, target: string) {
+    constructor(id: string, type: RelationshipType, target: string, targetMode?: TargetModeType) {
         super("Relationship");
 
         this.root.push(
@@ -24,6 +27,7 @@ export class Relationship extends XmlComponent {
                 id,
                 type,
                 target,
+                targetMode,
             }),
         );
     }
diff --git a/src/file/relationships/relationships.ts b/src/file/relationships/relationships.ts
index debfcada67..bd56ff1aab 100644
--- a/src/file/relationships/relationships.ts
+++ b/src/file/relationships/relationships.ts
@@ -1,6 +1,6 @@
 import { XmlComponent } from "file/xml-components";
 import { RelationshipsAttributes } from "./attributes";
-import { Relationship, RelationshipType } from "./relationship/relationship";
+import { Relationship, RelationshipType, TargetModeType } from "./relationship/relationship";
 
 export class Relationships extends XmlComponent {
     constructor() {
@@ -16,8 +16,8 @@ export class Relationships extends XmlComponent {
         this.root.push(relationship);
     }
 
-    public createRelationship(id: number, type: RelationshipType, target: string): Relationship {
-        const relationship = new Relationship(`rId${id}`, type, target);
+    public createRelationship(id: number, type: RelationshipType, target: string, targetMode?: TargetModeType): Relationship {
+        const relationship = new Relationship(`rId${id}`, type, target, targetMode);
         this.addRelationship(relationship);
 
         return relationship;