diff --git a/src/CONST.js b/src/CONST.js
index 8b380ae2beef..369049a6e79d 100755
--- a/src/CONST.js
+++ b/src/CONST.js
@@ -35,7 +35,62 @@ const CONST = {
 
     API_ATTACHMENT_VALIDATIONS: {
         // Same as the PHP layer allows
-        ALLOWED_EXTENSIONS: ['webp', 'jpg', 'jpeg', 'png', 'gif', 'pdf', 'html', 'txt', 'rtf', 'doc', 'docx', 'htm', 'tiff', 'tif', 'xml', 'mp3', 'mp4', 'mov'],
+        /* eslint-disable-next-line max-len */
+        UNALLOWED_EXTENSIONS: [
+            'ade',
+            'adp',
+            'apk',
+            'appx',
+            'appxbundle',
+            'bat',
+            'cab',
+            'chm',
+            'cmd',
+            'com',
+            'cpl',
+            'diagcab',
+            'diagcfg',
+            'diagpack',
+            'dll',
+            'dmg',
+            'ex',
+            'ex_',
+            'exe',
+            'hta',
+            'img',
+            'ins',
+            'iso',
+            'isp',
+            'jar',
+            'jnlp',
+            'js',
+            'jse',
+            'lib',
+            'lnk',
+            'mde',
+            'msc',
+            'msi',
+            'msix',
+            'msixbundle',
+            'msp',
+            'mst',
+            'nsh',
+            'pif',
+            'ps1',
+            'scr',
+            'sct',
+            'shb',
+            'sys',
+            'vb',
+            'vbe',
+            'vbs',
+            'vhd',
+            'vxd',
+            'wsc',
+            'wsf',
+            'wsh',
+            'xll',
+        ],
 
         // 24 megabytes in bytes, this is limit set on servers, do not update without wider internal discussion
         MAX_SIZE: 25165824,
diff --git a/src/components/AttachmentModal.js b/src/components/AttachmentModal.js
index ed40878285a3..ea5f5baa1558 100755
--- a/src/components/AttachmentModal.js
+++ b/src/components/AttachmentModal.js
@@ -167,8 +167,8 @@ class AttachmentModal extends PureComponent {
      */
     isValidFile(file) {
         const {fileExtension} = FileUtils.splitExtensionFromFileName(lodashGet(file, 'name', ''));
-        if (!_.contains(CONST.API_ATTACHMENT_VALIDATIONS.ALLOWED_EXTENSIONS, fileExtension.toLowerCase())) {
-            const invalidReason = `${this.props.translate('attachmentPicker.notAllowedExtension')} ${CONST.API_ATTACHMENT_VALIDATIONS.ALLOWED_EXTENSIONS.join(', ')}`;
+        if (_.contains(CONST.API_ATTACHMENT_VALIDATIONS.UNALLOWED_EXTENSIONS, fileExtension.toLowerCase())) {
+            const invalidReason = this.props.translate('attachmentPicker.notAllowedExtension');
             this.setState({
                 isAttachmentInvalid: true,
                 attachmentInvalidReasonTitle: this.props.translate('attachmentPicker.wrongFileType'),
diff --git a/src/languages/en.js b/src/languages/en.js
index b7131985b4f5..ca2976391924 100755
--- a/src/languages/en.js
+++ b/src/languages/en.js
@@ -152,7 +152,7 @@ export default {
         attachmentTooSmall: 'Attachment too small',
         sizeNotMet: 'Attachment size must be greater than 240 bytes.',
         wrongFileType: 'Attachment is the wrong type',
-        notAllowedExtension: 'Attachments must be one of the following types:',
+        notAllowedExtension: 'This filetype is not allowed',
     },
     avatarCropModal: {
         title: 'Edit photo',
diff --git a/src/languages/es.js b/src/languages/es.js
index 466392854f2a..537bfcb62189 100644
--- a/src/languages/es.js
+++ b/src/languages/es.js
@@ -151,7 +151,7 @@ export default {
         attachmentTooSmall: 'Archivo adjunto demasiado pequeño',
         sizeNotMet: 'El archivo adjunto debe ser mas grande que 240 bytes.',
         wrongFileType: 'El tipo del archivo adjunto es incorrecto',
-        notAllowedExtension: 'Los archivos adjuntos deben ser de uno de los siguientes tipos:',
+        notAllowedExtension: 'Este tipo de archivo no está permitido',
     },
     avatarCropModal: {
         title: 'Editar foto',