diff --git a/files/diskfree-tracker b/files/diskfree-tracker
index 4c35ebf..6612e09 100755
--- a/files/diskfree-tracker
+++ b/files/diskfree-tracker
@@ -224,7 +224,7 @@ def human_size(size,precision=1):
     if size<0:
         sign="-"
         size=-size
-    suffixes=['B','KB','MB','GB','TB']
+    suffixes=['B','KB','MB','GB','TB','PB','EB','ZB']
     suffixIndex = 0
     defPrecision=0
     while size > 1024: