diff --git a/bacon/commentmacro/CommentMacroLexer.py b/bacon/commentmacro/CommentMacroLexer.py
index 903c5f7..bfc22ab 100644
--- a/bacon/commentmacro/CommentMacroLexer.py
+++ b/bacon/commentmacro/CommentMacroLexer.py
@@ -1,4 +1,4 @@
-# Generated from CommentMacro.g4 by ANTLR 4.8
+# Generated from CommentMacro.g4 by ANTLR 4.9.1
 from antlr4 import *
 from io import StringIO
 from typing.io import TextIO
@@ -210,7 +210,7 @@ class CommentMacroLexer(Lexer):
 
     def __init__(self, input=None, output:TextIO = sys.stdout):
         super().__init__(input, output)
-        self.checkVersion("4.8")
+        self.checkVersion("4.9.1")
         self._interp = LexerATNSimulator(self, self.atn, self.decisionsToDFA, PredictionContextCache())
         self._actions = None
         self._predicates = None
diff --git a/bacon/commentmacro/CommentMacroListener.py b/bacon/commentmacro/CommentMacroListener.py
index ec2f2bb..76c1a0b 100644
--- a/bacon/commentmacro/CommentMacroListener.py
+++ b/bacon/commentmacro/CommentMacroListener.py
@@ -1,4 +1,4 @@
-# Generated from CommentMacro.g4 by ANTLR 4.8
+# Generated from CommentMacro.g4 by ANTLR 4.9.1
 from antlr4 import *
 if __name__ is not None and "." in __name__:
     from .CommentMacroParser import CommentMacroParser
diff --git a/bacon/commentmacro/CommentMacroParser.py b/bacon/commentmacro/CommentMacroParser.py
index d55b7ee..ecae753 100644
--- a/bacon/commentmacro/CommentMacroParser.py
+++ b/bacon/commentmacro/CommentMacroParser.py
@@ -1,4 +1,4 @@
-# Generated from CommentMacro.g4 by ANTLR 4.8
+# Generated from CommentMacro.g4 by ANTLR 4.9.1
 # encoding: utf-8
 from antlr4 import *
 from io import StringIO
@@ -244,7 +244,7 @@ class CommentMacroParser ( Parser ):
 
     def __init__(self, input:TokenStream, output:TextIO = sys.stdout):
         super().__init__(input, output)
-        self.checkVersion("4.8")
+        self.checkVersion("4.9.1")
         self._interp = ParserATNSimulator(self, self.atn, self.decisionsToDFA, self.sharedContextCache)
         self._predicates = None
 
@@ -252,6 +252,7 @@ class CommentMacroParser ( Parser ):
 
 
     class ProgContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -310,6 +311,7 @@ class CommentMacroParser ( Parser ):
 
 
     class StatementContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -391,6 +393,7 @@ class CommentMacroParser ( Parser ):
 
 
     class MacroContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -1943,6 +1946,7 @@ class CommentMacroParser ( Parser ):
 
 
     class TimeContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -1989,6 +1993,7 @@ class CommentMacroParser ( Parser ):
 
 
     class DeviceContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -2036,6 +2041,7 @@ class CommentMacroParser ( Parser ):
 
 
     class NodeTypeContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -2088,6 +2094,7 @@ class CommentMacroParser ( Parser ):
 
 
     class TargetContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -2165,6 +2172,7 @@ class CommentMacroParser ( Parser ):
 
 
     class SpanContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)
@@ -2218,6 +2226,7 @@ class CommentMacroParser ( Parser ):
 
 
     class NumberContext(ParserRuleContext):
+        __slots__ = 'parser'
 
         def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
             super().__init__(parent, invokingState)