diff --git a/lexerA1.g4 b/lexerA1.g4
index 1830641..4830e0d 100644
--- a/lexerA1.g4
+++ b/lexerA1.g4
@@ -48,6 +48,7 @@ fragment CharactersInLine:
 
 // KEYWORDS  --------------------------------------------------------------------------------------------------------
 Abstract: 'abstract';
+Assert: 'assert';
 Boolean: 'boolean';
 Break: 'break';
 Byte: 'byte';
@@ -245,4 +246,4 @@ fragment JavaLetter:
     [a-zA-Z_$];
 
 fragment JavaLetterOrDigit:
-    JavaLetter | [0-9];
\ No newline at end of file
+    JavaLetter | [0-9];