diff --git a/oletools/ezhexviewer.py b/oletools/ezhexviewer.py
index aef233b..d2a1abc 100644
--- a/oletools/ezhexviewer.py
+++ b/oletools/ezhexviewer.py
@@ -54,7 +54,7 @@ __version__ = '0.50'
 # + options to set title and msg
 
 
-from thirdparty.easygui import easygui
+from .thirdparty.easygui import easygui
 import sys
 
 # === PYTHON 2+3 SUPPORT ======================================================
@@ -154,4 +154,4 @@ def main():
 
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()
diff --git a/oletools/mraptor.py b/oletools/mraptor.py
index ee35654..921f213 100644
--- a/oletools/mraptor.py
+++ b/oletools/mraptor.py
@@ -66,8 +66,8 @@ __version__ = '0.51'
 
 import sys, logging, optparse, re
 
-from thirdparty.xglob import xglob
-from thirdparty.tablestream import tablestream
+from .thirdparty.xglob import xglob
+from .thirdparty.tablestream import tablestream
 
 import olevba
 
diff --git a/oletools/mraptor3.py b/oletools/mraptor3.py
index d74cf58..4d0edf7 100644
--- a/oletools/mraptor3.py
+++ b/oletools/mraptor3.py
@@ -63,13 +63,13 @@ __version__ = '0.50py3'
 
 import sys, logging, optparse, re
 
-from thirdparty.xglob import xglob
+from .thirdparty.xglob import xglob
 
 # import the python 3 version of tablestream:
-from thirdparty.tablestream import tablestream
+from .thirdparty.tablestream import tablestream
 
 # import the python 3 version of olevba
-import olevba3 as olevba
+from . import olevba3 as olevba
 
 # === LOGGING =================================================================
 
diff --git a/oletools/olebrowse.py b/oletools/olebrowse.py
index ba2e3dc..ed387d1 100644
--- a/oletools/olebrowse.py
+++ b/oletools/olebrowse.py
@@ -52,9 +52,9 @@ __version__ = '0.02'
 # - stream info: magic, entropy, ... ?
 
 import optparse, sys, os
-from thirdparty.easygui import easygui
-import thirdparty.olefile as olefile
-import ezhexviewer
+from .thirdparty.easygui import easygui
+from .thirdparty import olefile
+from . import ezhexviewer
 
 ABOUT = '~ About olebrowse'
 QUIT  = '~ Quit'
diff --git a/oletools/olemap.py b/oletools/olemap.py
index e8b8489..a42d47a 100644
--- a/oletools/olemap.py
+++ b/oletools/olemap.py
@@ -52,8 +52,8 @@ __version__ = '0.50'
 # === IMPORTS ================================================================
 
 import sys
-from thirdparty.olefile import olefile
-from thirdparty.tablestream import tablestream
+from .thirdparty.olefile import olefile
+from .thirdparty.tablestream import tablestream
 
 
 
diff --git a/oletools/olemeta.py b/oletools/olemeta.py
index 1ad0abd..b366da7 100644
--- a/oletools/olemeta.py
+++ b/oletools/olemeta.py
@@ -60,8 +60,8 @@ __version__ = '0.50'
 #=== IMPORTS =================================================================
 
 import sys, codecs
-import thirdparty.olefile as olefile
-from thirdparty.tablestream import tablestream
+import .thirdparty import olefile
+from .thirdparty.tablestream import tablestream
 
 
 #=== MAIN =================================================================
@@ -117,4 +117,4 @@ def main():
     ole.close()
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()
diff --git a/oletools/oleobj.py b/oletools/oleobj.py
index 50a48ff..3463563 100644
--- a/oletools/oleobj.py
+++ b/oletools/oleobj.py
@@ -70,8 +70,8 @@ __version__ = '0.51'
 
 import logging, struct, optparse, os, re, sys
 
-from thirdparty.olefile import olefile
-from thirdparty.xglob import xglob
+from .thirdparty.olefile import olefile
+from .thirdparty.xglob import xglob
 
 # === LOGGING =================================================================
 
diff --git a/oletools/oletimes.py b/oletools/oletimes.py
index 5970c8c..0dd5aa8 100644
--- a/oletools/oletimes.py
+++ b/oletools/oletimes.py
@@ -61,8 +61,8 @@ __version__ = '0.50'
 #=== IMPORTS =================================================================
 
 import sys, datetime
-import thirdparty.olefile as olefile
-from thirdparty.prettytable import prettytable
+from .thirdparty import olefile
+from .thirdparty.prettytable import prettytable
 
 
 # === MAIN ===================================================================
diff --git a/oletools/olevba.py b/oletools/olevba.py
index a4bcac8..ce7dc97 100644
--- a/oletools/olevba.py
+++ b/oletools/olevba.py
@@ -256,15 +256,16 @@ except ImportError:
                                + "see http://codespeak.net/lxml " \
                                + "or http://effbot.org/zone/element-index.htm")
 
-import thirdparty.olefile as olefile
-from thirdparty.prettytable import prettytable
-from thirdparty.xglob import xglob, PathNotFoundException
-from thirdparty.pyparsing.pyparsing import \
+from .thirdparty import olefile
+from .thirdparty.prettytable import prettytable
+from .thirdparty.xglob import xglob, PathNotFoundException
+from .thirdparty.pyparsing.pyparsing import \
         CaselessKeyword, CaselessLiteral, Combine, Forward, Literal, \
         Optional, QuotedString,Regex, Suppress, Word, WordStart, \
         alphanums, alphas, hexnums,nums, opAssoc, srange, \
         infixNotation, ParserElement
-import ppt_parser
+from . import ppt_parser
+
 
 # monkeypatch email to fix issue #32:
 # allow header lines without ":"
@@ -1886,7 +1887,7 @@ def detect_dridex_strings(vba_code):
     :param vba_code: str, VBA source code
     :return: list of str tuples (encoded string, decoded string)
     """
-    from thirdparty.DridexUrlDecoder.DridexUrlDecoder import DridexUrlDecode
+    from .thirdparty.DridexUrlDecoder.DridexUrlDecoder import DridexUrlDecode
 
     results = []
     found = set()
diff --git a/oletools/pyxswf.py b/oletools/pyxswf.py
index 00a974e..c6b6030 100644
--- a/oletools/pyxswf.py
+++ b/oletools/pyxswf.py
@@ -74,10 +74,11 @@ __version__ = '0.50'
 
 #=== IMPORTS =================================================================
 
-import optparse, sys, os, rtfobj
+import optparse, sys, os
+from . import rtfobj
 from io import BytesIO
-from thirdparty.xxxswf import xxxswf
-import thirdparty.olefile as olefile
+from .thirdparty.xxxswf import xxxswf
+from .thirdparty import olefile
 
 
 #=== MAIN =================================================================
diff --git a/oletools/rtfobj.py b/oletools/rtfobj.py
index a68c011..0c2ea57 100644
--- a/oletools/rtfobj.py
+++ b/oletools/rtfobj.py
@@ -83,12 +83,10 @@ __version__ = '0.51'
 import re, os, sys, binascii, logging, optparse
 import os.path
 
-from thirdparty.xglob import xglob
-from oleobj import OleObject, OleNativeStream
-import oleobj
-
-from thirdparty.tablestream import tablestream
-
+from .thirdparty.xglob import xglob
+from .thirdparty.tablestream import tablestream
+from .oleobj import OleObject, OleNativeStream
+from . import oleobj
 
 # === LOGGING =================================================================