diff --git a/package.json b/package.json
index 639ec38d9ec7db866a626ace4cd189a6ab3fb57b..84c631ea1cbf67b45688c7016afdb11bbc5e1aeb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "geomag-algorithms",
-  "version": "0.3.1",
+  "version": "0.4.2",
   "homepage": "http://geomag.usgs.gov/",
   "repository": "https://github.com/usgs/geomag-algorithms.git",
   "description": "Geomagnetism algorithms.",
diff --git a/setup.py b/setup.py
index 051486b3bb55387d5b2b25f8851bdac296f5362f..365d79453201d457517e43c340cf8360c99bdfd4 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from distutils.core import setup
 
 setup(
     name='geomag-algorithms',
-    version='0.4.0',
+    version='0.4.2',
     description='USGS Geomag IO Library',
     url='https://github.com/usgs/geomag-algorithms',
     packages=[