diff --git a/grammar.md b/grammar.md
index 52bc6bd..abcd7e7 100644
--- a/grammar.md
+++ b/grammar.md
@@ -119,9 +119,9 @@ Operator       | Precedence
 `"!=="`        | 7
 `"&"`          | 6
 `"^"`          | 5
-`"|"`          | 4
+`"\|"`          | 4
 `"&&"`         | 3
-`"||"`         | 2
+`"\|\|"`         | 2
 
 
 # Avoiding Extra Lookahead