diff --git a/NEWS b/NEWS
index a486dd7b900..8c4f30f161f 100644
--- a/NEWS
+++ b/NEWS
@@ -61,6 +61,9 @@ included in the vX.Y.Z section and be denoted as:
 4.1.1 -- April, 2021
 --------------------
 
+- Fix a number of datatype issues, including an issue with
+  improper handling of partial datatypes that could lead to
+  an unexpected application failure.
 - Change UCX PML to not warn about MPI_Request leaks during
   MPI_FINALIZE by default.  The old behavior can be restored with
   the mca_pml_ucx_request_leak_check MCA parameter.
diff --git a/VERSION b/VERSION
index 79bc5ae103b..58804e73eab 100644
--- a/VERSION
+++ b/VERSION
@@ -32,7 +32,7 @@ release=1
 # requirement is that it must be entirely printable ASCII characters
 # and have no white space.
 
-greek=rc3
+greek=rc4
 
 # If repo_rev is empty, then the repository version number will be
 # obtained during "make dist" via the "git describe --tags --always"