diff --git a/DESCRIPTION b/DESCRIPTION
index 13a3359..d87eaf5 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: roadoi
 Type: Package
 Title: Find Free Versions of Scholarly Publications via the oaDOI Service
-Version: 0.3.9000
+Version: 0.4
 Authors@R: c(
     person("Najko", "Jahn", role = c("aut", "cre"), email = "najko.jahn@gmail.com"),
     person("Tuija", "Sonkkila", role = c("ctb"), comment = "Tuija Sonkkila 
diff --git a/NEWS b/NEWS
index 033f6e7..fb1ec35 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+## roadoi 0.4
+
+Implements the oaDOI.org API version 2.
+
 ## roadoi 0.3
 
 Accepted for rOpenSci:
diff --git a/cran-comments.md b/cran-comments.md
index 448cc91..149bd72 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -2,7 +2,7 @@
 ## Test environments
 
 * local OS X install, R 3.4.1
-* ubuntu 12.04 (on travis-ci), R 3.4.0
+* ubuntu 12.04 (on travis-ci), R 3.4.1
 * win-builder (release, devel and oldrelease) and appveyor CI
 
 ## R CMD check results
@@ -21,7 +21,7 @@ and found no problems related to this submission.
 
 Dear CRAN maintainers, 
 
-This submission implements suggestions made during the rOpenSci onboarding process. 
+This submission implements the newest oadoi.org API version. 
 
 Thanks!