diff --git a/.gitignore b/.gitignore
index a34bc20..8e38275 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ cppad-20120101.1.gpl.tgz
 /cppad-20130000.2.gpl.tgz
 /cppad-20130000.3.gpl.tgz
 /cppad-20140000.2.gpl.tgz
+/cppad-20150000.4.gpl.tgz
diff --git a/sources b/sources
index 2c939a4..8149c3f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-5c2973e0a399167f4edc6551aa5e2432  cppad-20140000.2.gpl.tgz
+1720334972913771209883efd384ea0a  cppad-20150000.4.gpl.tgz