diff --git a/docs/part/trackable.md b/docs/part/trackable.md
index 957efe6..373c6e1 100644
--- a/docs/part/trackable.md
+++ b/docs/part/trackable.md
@@ -22,8 +22,8 @@ For faster input there are several ways to define the wanted serial numbers(SN):
 |  | `1` | `[1]` | single SN |
 | , | `1,3,5` | `[1, 3, 5]` | list of SNs |
 | - | `1-5` | `[1, 2, 3, 4, 5]` | strech of SN |
-| <start>+ | `4+` (with 3 numbers needed) | `[4, 5, 6]` | all needed SNs from <start> |
-| <start>+<lenght> | `2+2` | `[2, 3, 4]` | <length> SNs add. to <start> |
+| &lt;start&gt;+ | `4+` (with 3 numbers needed) | `[4, 5, 6]` | all needed SNs from &lt;start&gt; |
+| &lt;start&gt;+&lt;lenght&gt; | `2+2` | `[2, 3, 4]` | &lt;length&gt; SNs add. to &lt;start&gt; |
 
 These rules can be mix-and-matched with whitespaces or commas separating them.  
 For example: