diff --git a/Rules.md b/Rules.md
index 0bb64878..b9d5ca23 100644
--- a/Rules.md
+++ b/Rules.md
@@ -70,7 +70,7 @@ Comparison operators are:
 |`!=`| not equal to|
 |`>=`| greater than or equal to|
 |`<=`| lesser than or equal to|
-|`\|`| used for modulo calculation remainder = 0 (i.e., exact division)|
+|`\|`| used for [modulo operation](https://en.wikipedia.org/wiki/Modulo_operation) with remainder = 0 (exact division)|
 
 Some of available triggers: