diff --git a/build.py b/build.py
index c767aab..723e754 100644
--- a/build.py
+++ b/build.py
@@ -32,6 +32,10 @@ def set_properties(project):
         "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.3",
+        "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
     ])