diff --git a/3rdparty/python/requirements.txt b/3rdparty/python/requirements.txt
index e31739052c1..7f78c0e3b48 100644
--- a/3rdparty/python/requirements.txt
+++ b/3rdparty/python/requirements.txt
@@ -11,7 +11,7 @@ mock==2.0.0
 packaging==16.8
 pathspec==0.5.0
 pep8==1.6.2
-pex==1.2.6
+pex==1.2.8
 psutil==4.3.0
 pyflakes==1.1.0
 Pygments==1.4
diff --git a/tests/python/pants_test/backend/python/tasks2/test_resolve_requirements.py b/tests/python/pants_test/backend/python/tasks2/test_resolve_requirements.py
index fd5cecd9f76..c18f93a773f 100644
--- a/tests/python/pants_test/backend/python/tasks2/test_resolve_requirements.py
+++ b/tests/python/pants_test/backend/python/tasks2/test_resolve_requirements.py
@@ -90,7 +90,7 @@ def name_and_platform(whl):
     # pycparser is a dependency of cffi only on CPython.  We might as well check for it,
     # as extra verification that we correctly fetch transitive dependencies.
     if PythonInterpreter.get().identity.interpreter == 'CPython':
-      expected_name_and_platforms.add(('pycparser-2.17', 'any'))
+      expected_name_and_platforms.add(('pycparser-2.18', 'any'))
 
     self.assertTrue(expected_name_and_platforms.issubset(names_and_platforms),
                     '{} is not a subset of {}'.format(expected_name_and_platforms,