diff --git a/README.md b/README.md
index 53e5620..8174309 100644
--- a/README.md
+++ b/README.md
@@ -80,9 +80,13 @@ bazel test -c opt $COPT_FLAGS nucleus/...
 
 ## Version
 
-This is Nucleus 0.5.0.  Nucleus follows [semantic
+This is Nucleus 0.5.1.  Nucleus follows [semantic
 versioning](https://semver.org/).
 
+New in 0.5.1:
+
+* Added new utilities for working with DeepVariant pileup images and variant protos.
+
 New in 0.5.0:
 
 * Fixed bug preventing Nucleus to work with TensorFlow 2.0.
diff --git a/nucleus/pip_package/build_pip_package.sh b/nucleus/pip_package/build_pip_package.sh
index 7601464..74a57d1 100755
--- a/nucleus/pip_package/build_pip_package.sh
+++ b/nucleus/pip_package/build_pip_package.sh
@@ -28,7 +28,7 @@ set -x
 
 # When changing NUCLEUS_VERSION, be sure to also change it in
 # egg_files/PKG-INFO.
-NUCLEUS_VERSION="0.5.0"
+NUCLEUS_VERSION="0.5.1"
 PACKAGE_NAME="google_nucleus-${NUCLEUS_VERSION}"
 PYTHON_VERSION="3.5"
 
diff --git a/nucleus/pip_package/egg_files/PKG-INFO b/nucleus/pip_package/egg_files/PKG-INFO
index 2f57768..dee3189 100644
--- a/nucleus/pip_package/egg_files/PKG-INFO
+++ b/nucleus/pip_package/egg_files/PKG-INFO
@@ -1,6 +1,6 @@
 Metadata-Version: 1.1
 Name: google-nucleus
-Version: 0.5.0
+Version: 0.5.1
 Summary: A library for reading and writing genomics data.
 Home-page: https://github.com/google/nucleus
 Author: The Genomics team in Google Brain