diff --git a/pypybox2d/shapes.py b/pypybox2d/shapes.py
index 4788526..672ff01 100644
--- a/pypybox2d/shapes.py
+++ b/pypybox2d/shapes.py
@@ -28,6 +28,7 @@
 import math
 import operator
 from copy import copy
+from functools import reduce
 from .common import (PI, NUMBER_TYPES, Vec2, AABB, Transform, 
                      min_vector, max_vector, property)
 from .settings import (EPSILON, EPSILON_SQR, POLYGON_RADIUS)
diff --git a/setup.py b/setup.py
index 0cb034b..d1b97a8 100644
--- a/setup.py
+++ b/setup.py
@@ -84,6 +84,10 @@
     "Programming Language :: Python :: 3.0",
     "Programming Language :: Python :: 3.1",
     "Programming Language :: Python :: 3.2",
+    "Programming Language :: Python :: 3.4",
+    "Programming Language :: Python :: 3.5",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
     ]
 
 if build_cext: