diff --git a/src/lexer.rs b/src/lexer.rs
index 76323867..b84c86b0 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -48,6 +48,9 @@ pub enum Token {
     #[token("=")]
     Equal,
 
+    #[token("<=")]
+    Arrow,
+
     // Logical operators
     #[token("<")]
     LessThan,