diff --git a/client/src/app/+about/about-instance/contact-admin-modal.component.html b/client/src/app/+about/about-instance/contact-admin-modal.component.html
index b2cbd0873..c3c71bdee 100644
--- a/client/src/app/+about/about-instance/contact-admin-modal.component.html
+++ b/client/src/app/+about/about-instance/contact-admin-modal.component.html
@@ -25,6 +25,15 @@
         <div *ngIf="formErrors.fromEmail" class="form-error">{{ formErrors.fromEmail }}</div>
       </div>
 
+      <div class="form-group">
+        <label i18n for="subject">Subject</label>
+        <input
+          type="text" id="subject"
+          formControlName="subject" [ngClass]="{ 'input-error': formErrors['subject'] }"
+        >
+        <div *ngIf="formErrors.subject" class="form-error">{{ formErrors.subject }}</div>
+      </div>
+
       <div class="form-group">
         <label i18n for="body">Your message</label>
         <textarea id="body" formControlName="body" [ngClass]="{ 'input-error': formErrors['body'] }">
diff --git a/client/src/app/+about/about-instance/contact-admin-modal.component.ts b/client/src/app/+about/about-instance/contact-admin-modal.component.ts
index 7d79c2215..c609c98c3 100644
--- a/client/src/app/+about/about-instance/contact-admin-modal.component.ts
+++ b/client/src/app/+about/about-instance/contact-admin-modal.component.ts
@@ -39,6 +39,7 @@ export class ContactAdminModalComponent extends FormReactive implements OnInit {
     this.buildForm({
       fromName: this.instanceValidatorsService.FROM_NAME,
       fromEmail: this.instanceValidatorsService.FROM_EMAIL,
+      subject: this.instanceValidatorsService.SUBJECT,
       body: this.instanceValidatorsService.BODY
     })
   }
@@ -58,9 +59,10 @@ export class ContactAdminModalComponent extends FormReactive implements OnInit {
   sendForm () {
     const fromName = this.form.value['fromName']
     const fromEmail = this.form.value[ 'fromEmail' ]
+    const subject = this.form.value[ 'subject' ]
     const body = this.form.value[ 'body' ]
 
-    this.instanceService.contactAdministrator(fromEmail, fromName, body)
+    this.instanceService.contactAdministrator(fromEmail, fromName, subject, body)
         .subscribe(
           () => {
             this.notifier.success(this.i18n('Your message has been sent.'))
diff --git a/client/src/app/shared/forms/form-validators/instance-validators.service.ts b/client/src/app/shared/forms/form-validators/instance-validators.service.ts
index 5bb852858..cc5f3c5a1 100644
--- a/client/src/app/shared/forms/form-validators/instance-validators.service.ts
+++ b/client/src/app/shared/forms/form-validators/instance-validators.service.ts
@@ -7,6 +7,7 @@ import { Injectable } from '@angular/core'
 export class InstanceValidatorsService {
   readonly FROM_EMAIL: BuildFormValidator
   readonly FROM_NAME: BuildFormValidator
+  readonly SUBJECT: BuildFormValidator
   readonly BODY: BuildFormValidator
 
   constructor (private i18n: I18n) {
@@ -32,6 +33,19 @@ export class InstanceValidatorsService {
       }
     }
 
+    this.SUBJECT = {
+      VALIDATORS: [
+        Validators.required,
+        Validators.minLength(1),
+        Validators.maxLength(120)
+      ],
+      MESSAGES: {
+        'required': this.i18n('A subject is required.'),
+        'minlength': this.i18n('The subject must be at least 1 character long.'),
+        'maxlength': this.i18n('The subject cannot be more than 120 characters long.')
+      }
+    }
+
     this.BODY = {
       VALIDATORS: [
         Validators.required,
diff --git a/client/src/app/shared/instance/instance.service.ts b/client/src/app/shared/instance/instance.service.ts
index 61321ecce..d0c96941d 100644
--- a/client/src/app/shared/instance/instance.service.ts
+++ b/client/src/app/shared/instance/instance.service.ts
@@ -22,10 +22,11 @@ export class InstanceService {
                .pipe(catchError(res => this.restExtractor.handleError(res)))
   }
 
-  contactAdministrator (fromEmail: string, fromName: string, message: string) {
+  contactAdministrator (fromEmail: string, fromName: string, subject: string, message: string) {
     const body = {
       fromEmail,
       fromName,
+      subject,
       body: message
     }
 
diff --git a/server/controllers/api/server/contact.ts b/server/controllers/api/server/contact.ts
index b1144c94e..de02ffc0b 100644
--- a/server/controllers/api/server/contact.ts
+++ b/server/controllers/api/server/contact.ts
@@ -14,7 +14,7 @@ contactRouter.post('/contact',
 async function contactAdministrator (req: express.Request, res: express.Response) {
   const data = req.body as ContactForm
 
-  await Emailer.Instance.addContactFormJob(data.fromEmail, data.fromName, data.body)
+  await Emailer.Instance.addContactFormJob(data.fromEmail, data.fromName, data.subject, data.body)
 
   await Redis.Instance.setContactFormIp(req.ip)
 
diff --git a/server/lib/emailer.ts b/server/lib/emailer.ts
index c4a5a5853..73c2bcb1b 100644
--- a/server/lib/emailer.ts
+++ b/server/lib/emailer.ts
@@ -402,7 +402,7 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  addContactFormJob (fromEmail: string, fromName: string, body: string) {
+  addContactFormJob (fromEmail: string, fromName: string, subject: string, body: string) {
     const text = 'Hello dear admin,\n\n' +
       fromName + ' sent you a message' +
       '\n\n---------------------------------------\n\n' +
@@ -415,7 +415,7 @@ class Emailer {
       fromDisplayName: fromEmail,
       replyTo: fromEmail,
       to: [ CONFIG.ADMIN.EMAIL ],
-      subject: CONFIG.EMAIL.OBJECT.PREFIX + 'Contact form submitted',
+      subject: CONFIG.EMAIL.OBJECT.PREFIX + subject,
       text
     }
 
diff --git a/server/tests/api/check-params/contact-form.ts b/server/tests/api/check-params/contact-form.ts
index dbdd3a8a6..b3051945e 100644
--- a/server/tests/api/check-params/contact-form.ts
+++ b/server/tests/api/check-params/contact-form.ts
@@ -26,6 +26,7 @@ describe('Test contact form API validators', function () {
   const defaultBody = {
     fromName: 'super name',
     fromEmail: 'toto@example.com',
+    subject: 'my subject',
     body: 'Hello, how are you?'
   }
   let emailPort: number
diff --git a/server/tests/api/server/contact-form.ts b/server/tests/api/server/contact-form.ts
index 87e55060c..e4e895acb 100644
--- a/server/tests/api/server/contact-form.ts
+++ b/server/tests/api/server/contact-form.ts
@@ -43,6 +43,7 @@ describe('Test contact form', function () {
       url: server.url,
       fromEmail: 'toto@example.com',
       body: 'my super message',
+      subject: 'my subject',
       fromName: 'Super toto'
     })
 
@@ -55,7 +56,7 @@ describe('Test contact form', function () {
     expect(email['from'][0]['address']).equal('test-admin@localhost')
     expect(email['from'][0]['name']).equal('toto@example.com')
     expect(email['to'][0]['address']).equal('admin' + server.internalServerNumber + '@example.com')
-    expect(email['subject']).contains('Contact form')
+    expect(email['subject']).contains('my subject')
     expect(email['text']).contains('my super message')
   })
 
@@ -64,6 +65,7 @@ describe('Test contact form', function () {
       url: server.url,
       fromEmail: 'toto@example.com',
       body: 'my super message',
+      subject: 'my subject',
       fromName: 'Super toto'
     })
 
@@ -72,6 +74,7 @@ describe('Test contact form', function () {
       fromEmail: 'toto@example.com',
       body: 'my super message',
       fromName: 'Super toto',
+      subject: 'my subject',
       expectedStatus: 403
     })
   })
@@ -82,8 +85,9 @@ describe('Test contact form', function () {
     await sendContactForm({
       url: server.url,
       fromEmail: 'toto@example.com',
-      body: 'my super message',
-      fromName: 'Super toto'
+      fromName: 'Super toto',
+      subject: 'my subject',
+      body: 'my super message'
     })
   })
 
diff --git a/shared/extra-utils/server/contact-form.ts b/shared/extra-utils/server/contact-form.ts
index 80394cf99..e002e03dd 100644
--- a/shared/extra-utils/server/contact-form.ts
+++ b/shared/extra-utils/server/contact-form.ts
@@ -5,6 +5,7 @@ function sendContactForm (options: {
   url: string,
   fromEmail: string,
   fromName: string,
+  subject: string,
   body: string,
   expectedStatus?: number
 }) {
@@ -13,6 +14,7 @@ function sendContactForm (options: {
   const body: ContactForm = {
     fromEmail: options.fromEmail,
     fromName: options.fromName,
+    subject: options.subject,
     body: options.body
   }
   return request(options.url)
diff --git a/shared/models/server/contact-form.model.ts b/shared/models/server/contact-form.model.ts
index 0696be8b4..c23e6d1ba 100644
--- a/shared/models/server/contact-form.model.ts
+++ b/shared/models/server/contact-form.model.ts
@@ -1,5 +1,6 @@
 export interface ContactForm {
   fromEmail: string
   fromName: string
+  subject: string
   body: string
 }