diff --git a/changelog/unreleased/fix-tgz-mimetype.md b/changelog/unreleased/fix-tgz-mimetype.md
new file mode 100644
index 0000000000..ce675d1959
--- /dev/null
+++ b/changelog/unreleased/fix-tgz-mimetype.md
@@ -0,0 +1,5 @@
+Bugfix: Fix the tgz mime type
+
+We have fixed a bug when the tgz mime type was not "application/gzip"
+
+https://github.com/cs3org/reva/pull/4352
diff --git a/pkg/mime/mime.go b/pkg/mime/mime.go
index 0a5ab1ce28..9102491710 100644
--- a/pkg/mime/mime.go
+++ b/pkg/mime/mime.go
@@ -921,6 +921,7 @@ var mimeTypes = map[string]string{
 	"tfm":                      "application/x-tex-tfm",
 	"tfx":                      "image/tiff-fx",
 	"tga":                      "image/x-tga",
+	"tgz":                      "application/gzip",
 	"thmx":                     "application/vnd.ms-officetheme",
 	"tif":                      "image/tiff",
 	"tiff":                     "image/tiff",