diff --git a/src/lexer.py b/src/lexer.py
index b180117..0eb0dad 100644
--- a/src/lexer.py
+++ b/src/lexer.py
@@ -126,7 +126,7 @@ def t_BOOL(t):
 
 
 def t_ID(t):
-    r"(([\w_]+)|(\"[\w_]+\"|\'[\w_]+\')\s*\.\s*([\w_]+|\"[\w_]+\"|\'[\w_]+\'))(\s*\.\s*([\w_]+|\"[\w_]+\"|\'[\w_]+\'))*"
+    r"(([\w_-]+)|(\"[\w_-]+\"|\'[\w_-]+\')\s*\.\s*([\w_-]+|\"[\w_-]+\"|\'[\w_-]+\'))(\s*\.\s*([\w_-]+|\"[\w_-]+\"|\'[\w_-]+\'))*"
     t.value = [s.strip(" \"'") for s in t.value.split('.')]
     return t