diff --git a/lark/__init__.py b/lark/__init__.py
index cb92d75..ebd8d8d 100644
--- a/lark/__init__.py
+++ b/lark/__init__.py
@@ -1,5 +1,6 @@
 from .tree import Tree, Transformer, InlineTransformer
 from .common import ParseError, GrammarError
+from .lexer import UnexpectedInput, LexError
 from .lark import Lark
 from .utils import inline_args