diff --git a/docs/01-introduction/file-formats.md b/docs/01-introduction/file-formats.md
index 4f27495f23..b0f8b89947 100644
--- a/docs/01-introduction/file-formats.md
+++ b/docs/01-introduction/file-formats.md
@@ -9,15 +9,15 @@ Currently, only a limited number of file formats is accepted to be uploaded onto
 
 The following table shows the accepted file formats:
 
-| Category              | Accepted format                | Converted during ingest?                                                   |
-| --------------------- |--------------------------------| -------------------------------------------------------------------------- |
-| Text, XML<sup>1</sup> | TXT, XML, XSL, XSD             | No                                                                         |
-| Tables                | CSV, XLS, XLSX                 | No                                                                         |
-| 2D Images             | JPG, JPEG, JP2, PNG, TIF, TIFF | Yes, converted to JPEG 2000 by [Sipi](https://github.com/dasch-swiss/sipi) |
-| Audio                 | MPEG (MP3), MP4, WAV           | No                                                                         |
-| Video                 | MP4                            | No                                                                         |
-| Office                | PDF, DOC, DOCX, PPT, PPTX      | No                                                                         |
-| Archives              | ZIP, TAR, ISO, GZ, GZIP, 7Z    | No                                                                         |
+| Category              | Accepted format                        | Converted during ingest?                                                   |
+| --------------------- |----------------------------------------| -------------------------------------------------------------------------- |
+| Text, XML<sup>1</sup> | TXT, XML, XSL, XSD                     | No                                                                         |
+| Tables                | CSV, XLS, XLSX                         | No                                                                         |
+| 2D Images             | JPG, JPEG, JP2, PNG, TIF, TIFF         | Yes, converted to JPEG 2000 by [Sipi](https://github.com/dasch-swiss/sipi) |
+| Audio                 | MPEG (MP3), MP4, WAV                   | No                                                                         |
+| Video                 | MP4                                    | No                                                                         |
+| Office                | PDF, DOC, DOCX, PPT, PPTX              | No                                                                         |
+| Archives              | ZIP, TAR, GZ, Z, TAR.GZ, TGZ, GZIP, 7Z | No                                                                         |
 
 
 1: If your XML files represent text with markup (e.g. [TEI/XML](http://www.tei-c.org/)),
diff --git a/sipi/scripts/file_info.lua b/sipi/scripts/file_info.lua
index afb47895fc..4d75dcdaf3 100644
--- a/sipi/scripts/file_info.lua
+++ b/sipi/scripts/file_info.lua
@@ -39,9 +39,11 @@ local APPLICATION_PPT = "application/vnd.ms-powerpoint"
 local APPLICATION_PPTX = "application/vnd.openxmlformats-officedocument.presentationml.presentation"
 local APPLICATION_ZIP = "application/zip"
 local APPLICATION_TAR = "application/x-tar"
-local APPLICATION_ISO = "application/x-iso9660-image"
+local APPLICATION_GZ = "application/gzip"
 local APPLICATION_GZIP = "application/gzip"
 local APPLICATION_7Z = "application/x-7z-compressed"
+local APPLICATION_TGZ = "application/x-compress"
+local APPLICATION_Z = "application/x-compress"
 local VIDEO_MP4 = "video/mp4"
 
 
@@ -69,7 +71,6 @@ local text_mime_types = {
 
 local document_mime_types = {
     APPLICATION_PDF,
-    APPLICATION_ISO,
     APPLICATION_DOC,
     APPLICATION_DOCX,
     APPLICATION_XLS,
@@ -82,7 +83,9 @@ local archive_mime_types = {
     APPLICATION_TAR,
     APPLICATION_ZIP,
     APPLICATION_GZIP,
-    APPLICATION_7Z
+    APPLICATION_7Z,
+    APPLICATION_TGZ,
+    APPLICATION_Z
 }
 
 local video_mime_types = {
@@ -105,7 +108,6 @@ local text_extensions = {
 
 local document_extensions = {
     "pdf",
-    "iso",
     "doc",
     "docx",
     "xls",
@@ -119,7 +121,9 @@ local archive_extensions = {
     "tar",
     "gz",
     "gzip",
-    "7z"
+    "7z",
+    "tgz",
+    "z"
 }
 
 local video_extensions = {
diff --git a/webapi/src/main/resources/application.conf b/webapi/src/main/resources/application.conf
index 727e1890ba..46d4ba4723 100644
--- a/webapi/src/main/resources/application.conf
+++ b/webapi/src/main/resources/application.conf
@@ -323,7 +323,6 @@ app {
             "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
             "application/vnd.ms-powerpoint",
             "application/vnd.openxmlformats-officedocument.presentationml.presentation",
-            "application/x-iso9660-image",
         ]
         text-mime-types = ["application/xml", "text/xml", "text/csv", "text/plain"]
         video-mime-types = ["video/mp4"]
@@ -332,7 +331,8 @@ app {
             "application/zip",
             "application/x-tar",
             "application/gzip",
-            "application/x-7z-compressed"
+            "application/x-7z-compressed",
+            "application/x-compress"
         ]
     }