diff --git a/setup.py b/setup.py
index 74cbeb5f..d7ffa810 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
 if __name__ == "__main__":
     setuptools.setup(
         name='uf3',
-        version='0.3.2',
+        version='0.4.0',
         description='Ultra-Fast Force Fields for molecular dynamics',
         long_description=long_description,
         url='https://github.com/uf3/uf3',
@@ -43,4 +43,4 @@
                      'Operating System :: OS Independent',
                      'Topic :: Scientific/Engineering'],
         tests_require=test_requires,
-    )
\ No newline at end of file
+    )