diff --git a/apps/converter/office_converter.py b/apps/converter/office_converter.py
index 655c70d502..3ffab6d26b 100644
--- a/apps/converter/office_converter.py
+++ b/apps/converter/office_converter.py
@@ -19,6 +19,7 @@ CONVERTER_OFFICE_FILE_MIMETYPES = [
     u'application/mswrite',
     u'application/mspowerpoint',
     u'application/msexcel',
+    u'application/pgp-keys',
     u'application/vnd.ms-excel',
     u'application/vnd.ms-powerpoint',
     u'application/vnd.oasis.opendocument.chart',
@@ -40,6 +41,12 @@ CONVERTER_OFFICE_FILE_MIMETYPES = [
     u'application/vnd.oasis.opendocument.text-web',
     u'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
     u'application/vnd.ms-office',
+    u'text/x-c',
+    u'text/x-c++',
+    u'text/x-pascal',
+    u'text/x-msdos-batch',
+    u'text/x-python',
+    u'text/x-shellscript',
     u'text/plain',
     u'text/rtf',
 ]