diff --git a/setup.py b/setup.py
index 572c79c..6bd02ad 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
       url='https://github.com/zejn/pypdf2xml',
       scripts=['pdf2xml', 'pdfxml2csv', 'headerfilter'],
       packages=['pypdf2xml'],
-      install_requires=['pdfminer==20140328', 'lxml'],
+      install_requires=['pdfminer.six==20170720', 'lxml'],
       classifiers=[
           'Development Status :: 4 - Beta',
           'Intended Audience :: Developers',