diff --git a/dot_parser.py b/dot_parser.py
index ffd9384..045eb2f 100644
--- a/dot_parser.py
+++ b/dot_parser.py
@@ -22,7 +22,7 @@ import codecs
 
 from pyparsing import __version__ as pyparsing_version
 
-from pyparsing import ( nestedExpr, Literal, CaselessLiteral, Word, Upcase, OneOrMore, ZeroOrMore,
+from pyparsing import ( nestedExpr, Literal, CaselessLiteral, Word, OneOrMore, ZeroOrMore,
     Forward, NotAny, delimitedList, oneOf, Group, Optional, Combine, alphas, nums,
     restOfLine, cStyleComment, nums, alphanums, printables, empty, quotedString,
     ParseException, ParseResults, CharsNotIn, dblQuotedString, QuotedString, ParserElement )