diff --git a/pyhocon/config_parser.py b/pyhocon/config_parser.py
index 79b5ee7f..44dc6346 100644
--- a/pyhocon/config_parser.py
+++ b/pyhocon/config_parser.py
@@ -8,7 +8,20 @@
 import socket
 import sys
 from datetime import timedelta
-from glob import glob
+
+import pyparsing
+
+class ParseResults(pyparsing.ParseResults):
+    def __getattr__(self, item):
+        if item == '__deepcopy__':
+            raise AttributeError(item)
+        try:
+            return self[item]
+        except KeyError:
+            return ""
+
+
+pyparsing.ParseResults = ParseResults
 
 from pyparsing import (Forward, Group, Keyword, Literal, Optional,
                        ParserElement, ParseSyntaxException, QuotedString,
@@ -16,6 +29,7 @@
                        Word, ZeroOrMore, alphanums, alphas8bit, col, lineno,
                        replaceWith)
 
+
 import asset
 from pyhocon.config_tree import (ConfigInclude, ConfigList, ConfigQuotedString,
                                  ConfigSubstitution, ConfigTree,
@@ -46,6 +60,8 @@ def glob(pathname, recursive=False):
             warnings.warn('This version of python (%s) does not support recursive import' % sys.version)
         from glob import glob as _glob
         return _glob(pathname)
+else:
+    from glob import glob
 
 logger = logging.getLogger(__name__)
 
diff --git a/pyhocon/config_tree.py b/pyhocon/config_tree.py
index 48c38847..b446c4de 100644
--- a/pyhocon/config_tree.py
+++ b/pyhocon/config_tree.py
@@ -1,4 +1,17 @@
 from collections import OrderedDict
+
+import pyparsing
+class ParseResults(pyparsing.ParseResults):
+    class ParseResults(pyparsing.ParseResults):
+        def __getattr__(self, item):
+            if item == '__deepcopy__':
+                raise AttributeError(item)
+            try:
+                return self[item]
+            except KeyError:
+                return ""
+
+
 from pyparsing import lineno
 from pyparsing import col
 try:
diff --git a/pyhocon/converter.py b/pyhocon/converter.py
index 404c7571..bb51e851 100644
--- a/pyhocon/converter.py
+++ b/pyhocon/converter.py
@@ -14,6 +14,7 @@
     basestring
 except NameError:
     basestring = str
+    unicode = str
 
 
 class HOCONConverter(object):
diff --git a/setup.py b/setup.py
index 46ce7f8f..6f6c2a38 100755
--- a/setup.py
+++ b/setup.py
@@ -46,6 +46,7 @@ def run_tests(self):
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8'
     ],
     packages=[
         'pyhocon',